About: http://webisa.webdatacommons.org/330497993

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	Messages are filtered 501???502 by examining the content of the message body for keywords, boolean compares or other methods well known in the art.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com