About: http://webisa.webdatacommons.org/41930012

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	As for your question, there is an answer, but I do NOT know how authoritative it is:
http://www.w3.org/ns/prov#wasQuotedFrom	superuser.com