About: http://webisa.webdatacommons.org/39209227

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	Null is a reserved word and cannot be used for anything other than to check that a variable does not have an assigned value.
http://www.w3.org/ns/prov#wasQuotedFrom	codingforums.com