PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • A Stirling engine is a heat engine, not a compressed air engine though there is gas compression involved.
http://www.w3.org/ns/prov#wasQuotedFrom
  • wattsupwiththat.com