PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • biofuels: Biomass converted to liquid or gaseous fuels such as ethanol, methanol, methane, and hydrogen.
http://www.w3.org/ns/prov#wasQuotedFrom
  • nrel.gov