About: http://webisa.webdatacommons.org/438142579

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 essence, the system 200 provides an update service to spam filters to keep them current and effective against new forms of spam.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com