About: http://webisa.webdatacommons.org/282326814

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	Some of the concerns are the same as the ones you mention and several are a bit different.
http://www.w3.org/ns/prov#wasQuotedFrom	blogspot.com