PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Researchers at Columbia University have proven that graphene is the strongest material ever measured, some 200 times stronger than structural steel.
http://www.w3.org/ns/prov#wasQuotedFrom
  • maximumpc.com