PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Manufacturing processes often introduce heavy metals such as Copper, Nickel, Cadmium, Chrome, Zinc, Iron, and Lead into waste water.
http://www.w3.org/ns/prov#wasQuotedFrom
  • environmental-expert.com