About: http://webisa.webdatacommons.org/288035127

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 have seen this method being used on about three sites now, including Facebook, Dropbox and Microsoft's Skydrive.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com