PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Comments: Several commenters note that coal-plant emissions contain other toxins including mercury, lead, cadmium, chromium, dioxins, formaldehyde, arsenic, radioactive isotopes, oxide, and radon gas.
http://www.w3.org/ns/prov#wasQuotedFrom
  • federalregister.gov