PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The chemicals included nitrogen oxides, benzene, carbon monoxide, propane, isobutane and other emissions.
http://www.w3.org/ns/prov#wasQuotedFrom
  • democracynow.org