PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • They could operate on natural gas (or even biogas), solar energy, or a combination of many types of cost effective and clean fuels.
http://www.w3.org/ns/prov#wasQuotedFrom
  • slashdot.org