PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Phosgene is a colorless gas, or a clear to yellow volatile liquid used in making pesticides, resins, polyurethane, dyes, and other chemicals.
http://www.w3.org/ns/prov#wasQuotedFrom
  • pbs.org