PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Mercury is a by-product of various industrial applications, in particular it is found in emissions from coal-fired electrical generation plants in the Midwest.
http://www.w3.org/ns/prov#wasQuotedFrom
  • colby.edu