I have been helping with the backlog of "Article for Creation" requests on en.Wikipedia.
It occurs to me that in doing so I often supply enough data to start a Wikidata entry (or, at least, to pre-populate one for further editing before saving).
Please see :
https://en.wikipedia.org/wiki/Wikipedia_talk:WikiProject_Articles_for_creati...
for more on this; help from a coder would be useful.
Something for the hackathon, perhaps?