PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The computer readable storage medium of claim 15, wherein the electronic message is a message selected from the group consisting of an email message, IM message, SMS message, transcribed voice message, and any combination thereof.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com