Yes, you're right. 
I know, for example, that Pundit is a tool for semantic annotation, 
and it would probably be a good candidate to start with.
http://www.thepund.it/
(the won best poster at LODLAM, and are based in Italy. I met some of the staff and have already hinted about this possible feature).
The also collaborate with OKFN.

Aubrey



On Mon, Jul 1, 2013 at 9:57 PM, Sumana Harihareswara <sumanah@wikimedia.org> wrote:
On 06/21/2013 08:00 AM, Aubrey wrote:
> Another dream of mine is an annotator that could save "facts" in Wikidata
> statements.
> We could reald a newspaper online, or a book, or an article on a scientific
> blog, and highlight a short sentence, and this sentence would be a
> statement (Item has a Property Value), with a source (the original
> document).
> I bet this is not *so* difficult.

At first I thought you meant that it would be good to implement this in
Zotero https://www.zotero.org/ , Annotator
https://github.com/okfn/annotator , or a similar tool, to help a user
keep track of their own favorite Wikidata facts.  Now I understand :)
that you'd like, perhaps, a client-side browser plugin or script that
takes some highlighted text, offers the user a GUI to fix up the
statement and source, and then feeds it into Wikidata.  Am I right?

--
Sumana Harihareswara
Engineering Community Manager
Wikimedia Foundation