PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Elemental oxygen is supplied to the reaction either pure or diluted with inert gases such as nitrogen, helium, carbon dioxide and the like or as air.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com