PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • What???s more, two to three million gallons of fluid comes back up to the surface, carrying potentially hazardous substances such as sulfur, bromine, and arsenic.
http://www.w3.org/ns/prov#wasQuotedFrom
  • midwestenergynews.com