I don't recall what is the current stage of consensus regarding Wikisource
subpages on Wikidata, but because while playing "The Game" [1] I keep
getting this kind of item (mostly from es.wikisource), I've managed a way
to at least track those stuff [2]
I didn't did an exhaustive search for such items and I keep finding new,
but at this momment it returns 2k of items.
[1] -
https://tools.wmflabs.org/wikidata-game/
[2] -
http://tools.wmflabs.org/wikidata-todo/autolist.html?q=CLAIM%5B31%3A1715235…