PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • the meeting thread may be selected from inbox 900 and dragged using a mouse or other pointing device to another potential participant contact reference, such as a name in an address book, an address in another electronic mail, or a party with which a communication such as a video conference or a text chat is currently in progress.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com