PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The US is not a great example of how cheap shale gas can be because so much of what goes on in the US is distorted by subsidies and other forms of support given to the oil and gas industry.
http://www.w3.org/ns/prov#wasQuotedFrom
  • engineeringnews.co.za