PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Mercury emissions come from sources such as coal burning and small-scale gold mining, and mercury pollution also comes from discarded electronic and other consumer products.
http://www.w3.org/ns/prov#wasQuotedFrom
  • environmentalleader.com