About: http://webisa.webdatacommons.org/411347592

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 invention relates to a system for eliminating unwanted email, and particularly to one in which all email must be recognized as sent by an authorized sender in order to be accepted.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com