PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Its products include air gases such as nitrogen, oxygen, and argon as well as hydrogen, CO2, electricity, and steam.
http://www.w3.org/ns/prov#wasQuotedFrom
  • maintenancetechnology.com