About: http://webisa.webdatacommons.org/148058548

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 believe your first instinct is the best one - in that it is where you should look for the answer.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com