About: http://webisa.webdatacommons.org/425544838

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	Other pieces, mentioned in your question and other answers are also often useful, but are in no way obligatory.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com