PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • (4) Unconventional fossil fuels, including tar shale, tar sands, and methane hydrates, which contain more carbon than coal and other conventional reserves, must not be widely developed.
http://www.w3.org/ns/prov#wasQuotedFrom
  • cleanenergy-project.de