About: http://webisa.webdatacommons.org/54253965

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	And altho the rest of your post is spot on, this is IMHO the real opportunity in the 2012 context.
http://www.w3.org/ns/prov#wasQuotedFrom	freerepublic.com