PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Heavy metals such as lead, mercury, copper, nickel, chromium, cadmium, aluminum, and other dissolved metals are also removed from the water by this natural process of electrochemical process.
http://www.w3.org/ns/prov#wasQuotedFrom
  • crystalquest.com