About: http://webisa.webdatacommons.org/301255106

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	@rdlowrey: can not you just pass in a NULL when there is an argument expected that can not be provided --- no you cannot.
http://www.w3.org/ns/prov#wasQuotedFrom	stackoverflow.com