About: http://webisa.webdatacommons.org/221505698

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	You could not assign NULL to any pointer other than void*, which made it kind of useless.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com