About: http://webisa.webdatacommons.org/428576812

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	Content types of course not because there should be a point where everything begins naturally but if there would be some kind of similar other system I would definitely vote for content items.
http://www.w3.org/ns/prov#wasQuotedFrom	codeplex.com