PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • This electrode 212 is preferably tungsten (W), but may be any conductive material, such as aluminum, among others.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.ca