Hoi, A student is going to start some work on Wikidata quality based on a model of quality that is imho seriously suspect. It is item based and assumes that the more interwiki links there are, the more statements there are and the more references there are, the item will be of a higher quality.
I did protest against this approach and I did call into question that this work will help us achieve better quality at Wikidata. I did indicate what we should do to approach quality at Wikidata and I was indignantly told that research shows that I am wrong.
The research is about Wikipedia not Wikidata and the paper quoted does not mention Wikidata at all. As far as I am concerned we have been quite happy to only see English Wikipedia based research and consequently I doubt there is Wikimedia based research that is truly applicable.
At a previous time a student started work on a quality project for Wikidata; comparisons were to be made with external sources so that we could deduce quality. The student finished his or her research, I assume wrote a paper and left us with no working functionality. It is left at that. So the model were a student can do vital work for Wikidata is also very much in doubt.
I wrote in an e-mail to user:Epochfail:
Hoi, You refer to a publication, the basis for quality and it is NOT about Wikidata but about Wikipedia. What is discussed is quality for Wikidata where other assumptions are needed. My point to data is that its quality is in the connections that are made.
To some extend Wikidata reflects Wikipedia but not one Wikipedia, all Wikipedias. In addition there is a large and growing set of data with no links to Wikipedia or any of the other Wikimedia projects.
When you consider the current dataset, there are hardly any relevant sources. They do exist by inference - items based on Wikipedia are likely to have a source - items on an award are documented on the official website for the award - etc.
Quality is therefore in statements being the same on items that are identified as such.
When you consider Wikidata, it often has more items relating to a university, an award than a Wikipedia does and often it does not link to items representing articles in a specific Wikipedia. When you consider this alone you have actionable difference of at least 2%.
Sure enough plenty of scope of looking at Wikidata in its own context and NOT quoting studies that have nothing to do with Wikidata. Thanks, GerardM
My question to both researchers and Wikidata people is: Why would this Wikipedia model for quality apply to Wikidata? What research is it based on, is that research applicable and to what extend? Will the alternative approach to quality for WIKIDATA not provide us with more and better quality that will also be of relevance to Wikipedia quality? Thanks, GerardM
Hi GerardM
I don’t know if I am one of the researchers you mention in your email, but I have indeed carried out research around Wikidata quality and still am. I asked the community to help me gather different point of views over what data quality means on Wikidata in a RfC a couple of months ago.
If you wonder what happened to that and whether I published anything using that material without sharing any results with the community, well, the answer is no. What we collected is still there and still valuable, waiting to be properly analysed once we have enough time to dedicate more to it (which will happen later on this year).
As for your questions, I agree with you that looking at Wikidata quality with the eyes of (only one) Wikipedia may not be helpful in understanding its quality and appreciate its peculiarities. I have tried until now to rely more on more general quality dimensions and metrics, and on Linked Data-related ones. This does not mean that the quality criteria previously developed for Wikipedia are not important. They take into account the collaborative dimension of the project and are definitely helpful to assess Wikidata as a community product.
A short note in favour of my fellow researcher: an evaluation of Wikidata by item has been made already by identifying showcase items. Regardless of whether we think that evaluating quality by item is the most correct approach, I think it is definitely useful to show how good single units of information (Items) are. It is just ‘a’ measure for quality, not ‘the’ measure for quality. As with all research, it may either prove itself to be an incredibly valuable contribution to Wikidata (I believe it will) or to be useless after all. Whatever the outcome, students/researchers working on Wikidata help raise and focus on issues that are important for the community and for the project itself, imho of course.
Thanks, Alessandro
––– Alessandro Piscopo Web and Internet Science Group School of Electronics and Computer Science University of Southampton email: A.Piscopo@soton.ac.ukmailto:A.Piscopo@soton.ac.uk
On 22 Mar 2017, at 06:27, Gerard Meijssen <gerard.meijssen@gmail.commailto:gerard.meijssen@gmail.com> wrote:
Hoi, A student is going to start some work on Wikidata quality based on a model of quality that is imho seriously suspect. It is item based and assumes that the more interwiki links there are, the more statements there are and the more references there are, the item will be of a higher quality.
I did protest against this approach and I did call into question that this work will help us achieve better quality at Wikidata. I did indicate what we should do to approach quality at Wikidata and I was indignantly told that research shows that I am wrong.
The research is about Wikipedia not Wikidata and the paper quoted does not mention Wikidata at all. As far as I am concerned we have been quite happy to only see English Wikipedia based research and consequently I doubt there is Wikimedia based research that is truly applicable.
At a previous time a student started work on a quality project for Wikidata; comparisons were to be made with external sources so that we could deduce quality. The student finished his or her research, I assume wrote a paper and left us with no working functionality. It is left at that. So the model were a student can do vital work for Wikidata is also very much in doubt.
I wrote in an e-mail to user:Epochfail:
Hoi, You refer to a publication, the basis for quality and it is NOT about Wikidata but about Wikipedia. What is discussed is quality for Wikidata where other assumptions are needed. My point to data is that its quality is in the connections that are made.
To some extend Wikidata reflects Wikipedia but not one Wikipedia, all Wikipedias. In addition there is a large and growing set of data with no links to Wikipedia or any of the other Wikimedia projects.
When you consider the current dataset, there are hardly any relevant sources. They do exist by inference - items based on Wikipedia are likely to have a source - items on an award are documented on the official website for the award - etc.
Quality is therefore in statements being the same on items that are identified as such.
When you consider Wikidata, it often has more items relating to a university, an award than a Wikipedia does and often it does not link to items representing articles in a specific Wikipedia. When you consider this alone you have actionable difference of at least 2%.
Sure enough plenty of scope of looking at Wikidata in its own context and NOT quoting studies that have nothing to do with Wikidata. Thanks, GerardM
My question to both researchers and Wikidata people is: Why would this Wikipedia model for quality apply to Wikidata? What research is it based on, is that research applicable and to what extend? Will the alternative approach to quality for WIKIDATA not provide us with more and better quality that will also be of relevance to Wikipedia quality? Thanks, GerardM _______________________________________________ Wiki-research-l mailing list Wiki-research-l@lists.wikimedia.orgmailto:Wiki-research-l@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wiki-research-l
Hoi, When you consider the "collaroborative dimension", it is utterly different for Wikidata. An example: I just added a few statements to Dorothy Tarrant [1].For several of those statements I added hundreds of similar statements on other items. In order to add the award I had to add the award first. I updated the date of birth and death. When you consider the statements on most items, they are typically done by bot or by processes like I use. This "collaborative dimension" is relevant to Wikipedia, not to Wikidata.
You state that previously developed criteria for Wikipedia are important. Ok, how?
My problem with this approach is that it establishes Wikipedia think that is not appropriate for Wikidata. You are imho correct where you say that links are of more relevance. They are because they allow to compare links between Wikipedia articles and links between Wikidata items. This is actionable information because the two should largely be the same. I have described [2] how Wikidata can help in improving the quality of any Wikipedia and in the process improve its own quality. This can be done by associating wiki links and red links with Wikidata items. Tools can be of service in pointing out probable issues.
In your reply I find little argument why this approach is useful. I do not find a result that is actionable. There is little point to this approach and it does not fit with well with much of the Wikidata practice. Thanks, GerardM
[1] https://tools.wmflabs.org/reasonator/?q=Q18783615 [2] http://ultimategerardm.blogspot.nl/2016/01/wikipedia-lowest-hanging-fruit-fr...
On 22 March 2017 at 09:45, Piscopo A. A.Piscopo@soton.ac.uk wrote:
Hi GerardM
I don’t know if I am one of the researchers you mention in your email, but I have indeed carried out research around Wikidata quality and still am. I asked the community to help me gather different point of views over what data quality means on Wikidata in a RfC a couple of months ago.
If you wonder what happened to that and whether I published anything using that material without sharing any results with the community, well, the answer is no. What we collected is still there and still valuable, waiting to be properly analysed once we have enough time to dedicate more to it (which will happen later on this year).
As for your questions, I agree with you that looking at Wikidata quality with the eyes of (only one) Wikipedia may not be helpful in understanding its quality and appreciate its peculiarities. I have tried until now to rely more on more general quality dimensions and metrics, and on Linked Data-related ones. This does not mean that the quality criteria previously developed for Wikipedia are not important. They take into account the collaborative dimension of the project and are definitely helpful to assess Wikidata as a community product.
A short note in favour of my fellow researcher: an evaluation of Wikidata by item has been made already by identifying showcase items. Regardless of whether we think that evaluating quality by item is the most correct approach, I think it is definitely useful to show how good single units of information (Items) are. It is just ‘a’ measure for quality, not ‘the’ measure for quality. As with all research, it may either prove itself to be an incredibly valuable contribution to Wikidata (I believe it will) or to be useless after all. Whatever the outcome, students/researchers working on Wikidata help raise and focus on issues that are important for the community and for the project itself, imho of course.
Thanks, Alessandro
––– Alessandro Piscopo Web and Internet Science Group School of Electronics and Computer Science University of Southampton email: A.Piscopo@soton.ac.ukmailto:A.Piscopo@soton.ac.uk
On 22 Mar 2017, at 06:27, Gerard Meijssen <gerard.meijssen@gmail.com< mailto:gerard.meijssen@gmail.com>> wrote:
Hoi, A student is going to start some work on Wikidata quality based on a model of quality that is imho seriously suspect. It is item based and assumes that the more interwiki links there are, the more statements there are and the more references there are, the item will be of a higher quality.
I did protest against this approach and I did call into question that this work will help us achieve better quality at Wikidata. I did indicate what we should do to approach quality at Wikidata and I was indignantly told that research shows that I am wrong.
The research is about Wikipedia not Wikidata and the paper quoted does not mention Wikidata at all. As far as I am concerned we have been quite happy to only see English Wikipedia based research and consequently I doubt there is Wikimedia based research that is truly applicable.
At a previous time a student started work on a quality project for Wikidata; comparisons were to be made with external sources so that we could deduce quality. The student finished his or her research, I assume wrote a paper and left us with no working functionality. It is left at that. So the model were a student can do vital work for Wikidata is also very much in doubt.
I wrote in an e-mail to user:Epochfail:
Hoi, You refer to a publication, the basis for quality and it is NOT about Wikidata but about Wikipedia. What is discussed is quality for Wikidata where other assumptions are needed. My point to data is that its quality is in the connections that are made.
To some extend Wikidata reflects Wikipedia but not one Wikipedia, all Wikipedias. In addition there is a large and growing set of data with no links to Wikipedia or any of the other Wikimedia projects.
When you consider the current dataset, there are hardly any relevant sources. They do exist by inference - items based on Wikipedia are likely to have a source - items on an award are documented on the official website for the award - etc.
Quality is therefore in statements being the same on items that are identified as such.
When you consider Wikidata, it often has more items relating to a university, an award than a Wikipedia does and often it does not link to items representing articles in a specific Wikipedia. When you consider this alone you have actionable difference of at least 2%.
Sure enough plenty of scope of looking at Wikidata in its own context and NOT quoting studies that have nothing to do with Wikidata. Thanks, GerardM
My question to both researchers and Wikidata people is: Why would this Wikipedia model for quality apply to Wikidata? What research is it based on, is that research applicable and to what extend? Will the alternative approach to quality for WIKIDATA not provide us with more and better quality that will also be of relevance to Wikipedia quality? Thanks, GerardM _______________________________________________ Wiki-research-l mailing list Wiki-research-l@lists.wikimedia.orgmailto:Wiki- research-l@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wiki-research-l
Wiki-research-l mailing list Wiki-research-l@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wiki-research-l
On Wed, Mar 22, 2017 at 10:03 AM, Gerard Meijssen gerard.meijssen@gmail.com wrote:
In your reply I find little argument why this approach is useful. I do not find a result that is actionable. There is little point to this approach and it does not fit with well with much of the Wikidata practice.
Gerard, the outcome will be very actionable. We will have the groundwork needed to identify individual items and sets of items that need improvement. If it for example turns out that our items related to railroads are particularly lacking then that is something we can concentrate on if we so chose. We can do editathons, data partnerships, quality drives and and and.
Cheers Lydia
Hoi, What I have read is that it will be individual items that are graded. That is not what helps you determine what items are lacking in something. When you want to determine if something is lacking you need a relational approach. When you approach a award like this one [1], it was added to make the award for a person [2] more complete. No real importance is given to this award, just a few more people were added because they are part of a group that gets more attention from me [3]. For yet another award [4], I added all the people who received the award because I was told by someone's expert opinion that they were all notable (in the Wikipedia sense of the word). I added several of these people in Wikidata. Arguably, the Wikidata the quality for the item for the award is great but it has no article associated to it in Wikipedia but that has nothing to do with the quality of the information it provides. It is easy and obvious to recognise in one level deeper that quality issues arise; the info for several people is meagre at best.You cannot deny their relevance though; removing them destroys the quality for the award.
The point is that in relations you can describe quality, in the grading that is proposed there is nothing really that is actionable.
When you add links to the mix, these same links have no bearing on the quality of the Wikidata item. Why would it? Links only become interesting when you compare the statements in Wikidata with the links to other articles in the same Wikipedia. This is not what this approach brings.
Really, how will the grades to items make a difference. How will it help us understand that "items relating to railroads are lacking"? It does not.
When you want to have indicators for quality; here is one.. an author (and its subclasses) should have a VIAF identifier. An artist with objects in the Getty Museum should have an ULAN number. The lack of such information is actionable. The number of interwiki links is not, the number of statements are not and even references are not that convincing. Thanks, GerardM
[1] https://tools.wmflabs.org/reasonator/?&q=29000734 [2] https://tools.wmflabs.org/reasonator/?&q=7315382 [3] https://tools.wmflabs.org/reasonator/?&q=3308284 [4] https://tools.wmflabs.org/reasonator/?&q=28934266
On 22 March 2017 at 11:56, Lydia Pintscher lydia.pintscher@wikimedia.de wrote:
On Wed, Mar 22, 2017 at 10:03 AM, Gerard Meijssen gerard.meijssen@gmail.com wrote:
In your reply I find little argument why this approach is useful. I do
not
find a result that is actionable. There is little point to this approach and it does not fit with well with much of the Wikidata practice.
Gerard, the outcome will be very actionable. We will have the groundwork needed to identify individual items and sets of items that need improvement. If it for example turns out that our items related to railroads are particularly lacking then that is something we can concentrate on if we so chose. We can do editathons, data partnerships, quality drives and and and.
Cheers Lydia
-- Lydia Pintscher - http://about.me/lydia.pintscher Product Manager for Wikidata
Wikimedia Deutschland e.V. Tempelhofer Ufer 23-24 10963 Berlin www.wikimedia.de
Wikimedia Deutschland - Gesellschaft zur Förderung Freien Wissens e. V.
Eingetragen im Vereinsregister des Amtsgerichts Berlin-Charlottenburg unter der Nummer 23855 Nz. Als gemeinnützig anerkannt durch das Finanzamt für Körperschaften I Berlin, Steuernummer 27/029/42207.
Wikidata mailing list Wikidata@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikidata
Hey wiki-research-l folks,
Gerard didn't actually link you to the quality criteria he takes issue with. See https://www.wikidata.org/wiki/Wikidata:Item_quality I think Gerard's argument basically boils down to Wikidata != Wikipedia, but it's unclear how that is relevant to the goal of measuring the quality of items. This is something I've been talking to Lydia about for a long time. It's been great for the few Wikis where we have models deployed in ORES[1] (English, French, and Russian Wikipedia). So we'd like to have the same for Wikidata. As Lydia said, we do all sorts of fascinating things with a model like this. Honestly, I think the criteria is coming together quite nicely and we're just starting a pilot labeling campaign to work through a set of issues before starting the primary labeling drive.
-Aaron
On Wed, Mar 22, 2017 at 6:39 AM, Gerard Meijssen gerard.meijssen@gmail.com wrote:
Hoi, What I have read is that it will be individual items that are graded. That is not what helps you determine what items are lacking in something. When you want to determine if something is lacking you need a relational approach. When you approach a award like this one [1], it was added to make the award for a person [2] more complete. No real importance is given to this award, just a few more people were added because they are part of a group that gets more attention from me [3]. For yet another award [4], I added all the people who received the award because I was told by someone's expert opinion that they were all notable (in the Wikipedia sense of the word). I added several of these people in Wikidata. Arguably, the Wikidata the quality for the item for the award is great but it has no article associated to it in Wikipedia but that has nothing to do with the quality of the information it provides. It is easy and obvious to recognise in one level deeper that quality issues arise; the info for several people is meagre at best.You cannot deny their relevance though; removing them destroys the quality for the award.
The point is that in relations you can describe quality, in the grading that is proposed there is nothing really that is actionable.
When you add links to the mix, these same links have no bearing on the quality of the Wikidata item. Why would it? Links only become interesting when you compare the statements in Wikidata with the links to other articles in the same Wikipedia. This is not what this approach brings.
Really, how will the grades to items make a difference. How will it help us understand that "items relating to railroads are lacking"? It does not.
When you want to have indicators for quality; here is one.. an author (and its subclasses) should have a VIAF identifier. An artist with objects in the Getty Museum should have an ULAN number. The lack of such information is actionable. The number of interwiki links is not, the number of statements are not and even references are not that convincing. Thanks, GerardM
[1] https://tools.wmflabs.org/reasonator/?&q=29000734 [2] https://tools.wmflabs.org/reasonator/?&q=7315382 [3] https://tools.wmflabs.org/reasonator/?&q=3308284 [4] https://tools.wmflabs.org/reasonator/?&q=28934266
On 22 March 2017 at 11:56, Lydia Pintscher lydia.pintscher@wikimedia.de wrote:
On Wed, Mar 22, 2017 at 10:03 AM, Gerard Meijssen gerard.meijssen@gmail.com wrote:
In your reply I find little argument why this approach is useful. I do
not
find a result that is actionable. There is little point to this
approach
and it does not fit with well with much of the Wikidata practice.
Gerard, the outcome will be very actionable. We will have the groundwork needed to identify individual items and sets of items that need improvement. If it for example turns out that our items related to railroads are particularly lacking then that is something we can concentrate on if we so chose. We can do editathons, data partnerships, quality drives and and and.
Cheers Lydia
-- Lydia Pintscher - http://about.me/lydia.pintscher Product Manager for Wikidata
Wikimedia Deutschland e.V. Tempelhofer Ufer 23-24 10963 Berlin www.wikimedia.de
Wikimedia Deutschland - Gesellschaft zur Förderung Freien Wissens e. V.
Eingetragen im Vereinsregister des Amtsgerichts Berlin-Charlottenburg unter der Nummer 23855 Nz. Als gemeinnützig anerkannt durch das Finanzamt für Körperschaften I Berlin, Steuernummer 27/029/42207.
Wikidata mailing list Wikidata@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikidata
Wiki-research-l mailing list Wiki-research-l@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wiki-research-l
Hoi, You are conflating two things that are not related. ORES is really helpful and there is plenty of room for it to function extremely well on Wikidata. Yes, ORES will do good things for Wikidata but it is separated from the proposed item quality.
When an item is created because of the existence on the Kyrgyz Wikipedia, it may not even have a label. This happens a lot and Amir, the developer of ORES has a bot that he regularly runs to add one label. The name of the article. When an article is added the same bot does the same work. We do not have to rate it for a specific "level of quality" when we are to improve our quality, this bot runs every week automatically. When an automated rating system sees this, it can perform the remedy..
When as I understand from Lydia, the ratings are done automagically, in an ORES kinda way, it gains relevance. The point though is that still the quality of all the individual items on their own is of hardly any significance. It becomes relevant when it can accept the result of a query and provide results on the basis of that.. For instance.. all the items with "catalog" "black lunch table" and give me a rating for all the articles with no articles or no articles in Spanish...
The problem with rating "item quality" is that on its own, it has no application. I just finished adding award winners [1]. Based on the quality of the English article, I added the award winners using "linked items" and "petscan". I added a few items because as there are no articles. The Turkish article for the award has plenty of red links. It would be a quality improvement when these red links are associated with the items. An article writer immediately finds the English article and the Wikidata statements. That is actionable quality as it provides a way to stabilise both Wikidata, en.wp and tr.wp. For the Turkish language the labels of the red links may be used. When you consider quality, it is like an onion. On the first level all the information is there, on the second level, we may be missing education (that may still be in Freebase).. an employer. whatever makes sense in a context
When there is not even a red link but a text like for English, a tool like ORES could recognise the label in the text and accept it as a result that is probably positive.
When we are really interested in quality, we need to compare the content of the many projects including Wikidata and find that it is in balance.
My key criticism stands of the current quality standard: this is a first step but there are severe doubt of the relevance of several aspects. As a first iteration it will prove what is good and where it needs improvement. But without an interface into query it is useless. Thanks, GerardM
[1] https://tools.wmflabs.org/reasonator/?q=Q13582570
On 22 March 2017 at 15:33, Aaron Halfaker aaron.halfaker@gmail.com wrote:
Hey wiki-research-l folks,
Gerard didn't actually link you to the quality criteria he takes issue with. See https://www.wikidata.org/wiki/Wikidata:Item_quality I think Gerard's argument basically boils down to Wikidata != Wikipedia, but it's unclear how that is relevant to the goal of measuring the quality of items. This is something I've been talking to Lydia about for a long time. It's been great for the few Wikis where we have models deployed in ORES[1] (English, French, and Russian Wikipedia). So we'd like to have the same for Wikidata. As Lydia said, we do all sorts of fascinating things with a model like this. Honestly, I think the criteria is coming together quite nicely and we're just starting a pilot labeling campaign to work through a set of issues before starting the primary labeling drive.
-Aaron
On Wed, Mar 22, 2017 at 6:39 AM, Gerard Meijssen < gerard.meijssen@gmail.com> wrote:
Hoi, What I have read is that it will be individual items that are graded.
That
is not what helps you determine what items are lacking in something. When you want to determine if something is lacking you need a relational approach. When you approach a award like this one [1], it was added to
make
the award for a person [2] more complete. No real importance is given to this award, just a few more people were added because they are part of a group that gets more attention from me [3]. For yet another award [4], I added all the people who received the award because I was told by
someone's
expert opinion that they were all notable (in the Wikipedia sense of the word). I added several of these people in Wikidata. Arguably, the
Wikidata
the quality for the item for the award is great but it has no article associated to it in Wikipedia but that has nothing to do with the quality of the information it provides. It is easy and obvious to recognise in
one
level deeper that quality issues arise; the info for several people is meagre at best.You cannot deny their relevance though; removing them destroys the quality for the award.
The point is that in relations you can describe quality, in the grading that is proposed there is nothing really that is actionable.
When you add links to the mix, these same links have no bearing on the quality of the Wikidata item. Why would it? Links only become interesting when you compare the statements in Wikidata with the links to other articles in the same Wikipedia. This is not what this approach brings.
Really, how will the grades to items make a difference. How will it help
us
understand that "items relating to railroads are lacking"? It does not.
When you want to have indicators for quality; here is one.. an author
(and
its subclasses) should have a VIAF identifier. An artist with objects in the Getty Museum should have an ULAN number. The lack of such information is actionable. The number of interwiki links is not, the number of statements are not and even references are not that convincing. Thanks, GerardM
[1] https://tools.wmflabs.org/reasonator/?&q=29000734 [2] https://tools.wmflabs.org/reasonator/?&q=7315382 [3] https://tools.wmflabs.org/reasonator/?&q=3308284 [4] https://tools.wmflabs.org/reasonator/?&q=28934266
On 22 March 2017 at 11:56, Lydia Pintscher <lydia.pintscher@wikimedia.de
wrote:
On Wed, Mar 22, 2017 at 10:03 AM, Gerard Meijssen gerard.meijssen@gmail.com wrote:
In your reply I find little argument why this approach is useful. I
do
not
find a result that is actionable. There is little point to this
approach
and it does not fit with well with much of the Wikidata practice.
Gerard, the outcome will be very actionable. We will have the groundwork needed to identify individual items and sets of items that need improvement. If it for example turns out that our items related to railroads are particularly lacking then that is something we can concentrate on if we so chose. We can do editathons, data partnerships, quality drives and and and.
Cheers Lydia
-- Lydia Pintscher - http://about.me/lydia.pintscher Product Manager for Wikidata
Wikimedia Deutschland e.V. Tempelhofer Ufer 23-24 10963 Berlin www.wikimedia.de
Wikimedia Deutschland - Gesellschaft zur Förderung Freien Wissens e. V.
Eingetragen im Vereinsregister des Amtsgerichts Berlin-Charlottenburg unter der Nummer 23855 Nz. Als gemeinnützig anerkannt durch das Finanzamt für Körperschaften I Berlin, Steuernummer 27/029/42207.
Wikidata mailing list Wikidata@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wikidata
Wiki-research-l mailing list Wiki-research-l@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wiki-research-l
Wiki-research-l mailing list Wiki-research-l@lists.wikimedia.org https://lists.wikimedia.org/mailman/listinfo/wiki-research-l
wiki-research-l@lists.wikimedia.org