PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • These purge streams may contain CO, CO2, H2, H2O, CH4, and other hydrocarbons.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com