About: http://webisa.webdatacommons.org/235068668

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	I think they were planning to add an API where anybody could add other types to the system.
http://www.w3.org/ns/prov#wasQuotedFrom	slashdot.org