PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • In 2008, another Columbia University engineering research team found that despite its atom-thinness, graphene is the strongest material ever measured, at 200 times the strength of steel.
http://www.w3.org/ns/prov#wasQuotedFrom
  • talkingpointsmemo.com