About: http://webisa.webdatacommons.org/421121174

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	In one implementation, the media content can be periodically evaluated for an update, such as every ten (10) minutes or some other predetermined period of time.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk