About: http://webisa.webdatacommons.org/55172133

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	They have a filter that tries to detect whether an URL is a story or not.
http://www.w3.org/ns/prov#wasQuotedFrom	stackexchange.com