PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Economically, there would be a very low probability that coal will not be used in the future and the best option is that its use be as ???clean??? as possible.
http://www.w3.org/ns/prov#wasQuotedFrom
  • realclimate.org