About: http://webisa.webdatacommons.org/99861238

Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	I do not know whether these are at your level or way too hard, but they might give you a sense for the sort of thing people are thinking about.
http://www.w3.org/ns/prov#wasQuotedFrom	mathoverflow.net