About: http://webisa.webdatacommons.org/138659978

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	This approach has been used by many, including Google, but is particularly popular with social networks, for the obvious reason that they have a database of engaged potential volunteers.
http://www.w3.org/ns/prov#wasQuotedFrom	searchenginewatch.com