PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Suitable inert gases, i.e. gases which do not react under the particular process conditions required, include noble gases, such as helium or argon, and carbon dioxide, but especially nitrogen and also mixtures of such gases.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com