PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • These two chemicals could then be used to produce liquid fuels, such as hydrogen, and other useful chemicals.
http://www.w3.org/ns/prov#wasQuotedFrom
  • hydrogenfuelnews.com