About: http://webisa.webdatacommons.org/187152329

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	So in the Correspondence ItemSelector example above, every Item that has the Email ItemSelector would also have assigned to it the ItemSelector Correspondence, but the converse could not be asserted: not every Correspondence is an Email.
http://www.w3.org/ns/prov#wasQuotedFrom	google.ca