PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Graphene is the thinnest material he is ever been found ??? it is made up of a single layer of carbon atoms locked together in a honeycomb lattice.
http://www.w3.org/ns/prov#wasQuotedFrom
  • maths.org