PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • ???The major contaminants of concern are heavy metals such as lead, zinc, cadmium, arsenic, and manganese associated with the mining wastes.
http://www.w3.org/ns/prov#wasQuotedFrom
  • marginalrevolution.com