PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Then you have an abundance of hydrogen which burns very clean, although the process requires heat, pressure and several types of catalyst and carbon dioxide, which is also marketable.
http://www.w3.org/ns/prov#wasQuotedFrom
  • ecowatch.com