About: http://webisa.webdatacommons.org/183404014

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	So, this does not directly answer the question, but it is does provide the sort of implementation that I was thinking about.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com