Hey Sebastian,

On 9/20/19 10:22 AM, Sebastian Hellmann wrote:
> Not much of Freebase did end up in Wikidata.

Dropping here some pointers to shed light on the migration of Freebase
to Wikidata, since I was partially involved in the process:
1. WikiProject [1];
2. the paper behind [2];
3. datasets to be migrated [3].

I can confirm that the migration has stalled: as of today, *528
thousands* Freebase statements were curated by the community, out of *10
million* ones. By 'curated', I mean approved or rejected.
These numbers come from two queries against the primary sources tool
database.

The stall is due to several causes: in my opinion, the most important
one was the bad quality of sources [4,5] coming from the Knowledge Vault
project [6].

Cheers,

Marco

[1] https://www.wikidata.org/wiki/Wikidata:WikiProject_Freebase
[2]
http://static.googleusercontent.com/media/research.google.com/en//pubs/archive/44818.pdf
[3]
https://www.wikidata.org/wiki/Wikidata:Primary_sources_tool/Version_1#Data
[4]
https://www.wikidata.org/wiki/Wikidata_talk:Primary_sources_tool/Archive/2017#Quality_of_sources
[5]
https://www.wikidata.org/wiki/Wikidata:Requests_for_comment/Semi-automatic_Addition_of_References_to_Wikidata_Statements#A_whitelist_for_sources
[6] https://www.cs.ubc.ca/~murphyk/Papers/kv-kdd14.pdf

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