PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Graphene, a single layer of carbon atoms, is a material of great scientific and technological interest in part because it conducts electrons at high speed.
http://www.w3.org/ns/prov#wasQuotedFrom
  • phys.org