About: http://webisa.webdatacommons.org/239030003

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 am not sure about the combination but you are correct in that finding someone who specialises in this stuff is a good idea.
http://www.w3.org/ns/prov#wasQuotedFrom	metafilter.com