PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • A biofuel is any fuel source derived from naturally occurring biological processes: Ethanol, for instance, can be derived from crops such as corn, rye and sugarcane.
http://www.w3.org/ns/prov#wasQuotedFrom
  • renewableenergyfocus.com