At BEIC, to test the Wikidata ontology and the feasibility of collaborations on music data, I was assigned a seemingly simple test: add in Wikidata all the data contained in https://en.wikipedia.org/wiki/Brown_Sugar_(The_Rolling_Stones_song) .
Turns out things are not so simple: * the Wikipedia articles, from an FRBR (https://en.wikipedia.org/wiki/FRBR ) perspective, often mix multiple levels or even all of them (song, recording, album, single, edition of the single) which on Wikidata need to be separate items, but the split is not obvious: https://www.wikidata.org/wiki/Special:WhatLinksHere/Q21887964 ; * I was unable to properly add information on per-country hit list position.
Please give a look to the items I linked, to my https://www.wikidata.org/wiki/Wikidata:WikiProject_Music updates and to the open questions I added in https://www.wikidata.org/wiki/Wikidata_talk:WikiProject_Music .
In particular, I think librarians will be interested in this proposal for a "performance of" property, which (like the existing "edition of" property) could benefit from being framed in a FRBR perspective by someone more versed in FRBR. https://www.wikidata.org/?diff=287456096
Nemo-BEIC