About: http://webisa.webdatacommons.org/30355280

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 find it odd that this seems to be the closest thing to what OP is looking for, but it is quite useful nevertheless.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com