About: http://webisa.webdatacommons.org/9921631

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 even classify them by using some big concepts from the real world, such as space, time, self, and knowledge:
http://www.w3.org/ns/prov#wasQuotedFrom	smallpieces.com