PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Smoke from oil fires contains a range of contaminants such as sulphur, mercury, dioxins and furans.
http://www.w3.org/ns/prov#wasQuotedFrom
  • unep.org