PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Graphene is a form of carbon just one atom thick with a variety of unusual properties, including a high van der Waals force.
http://www.w3.org/ns/prov#wasQuotedFrom
  • newscientist.com