PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Anecdotal evidence of drinking water pollution from fracking has been treated as just that ??? anecdotes ??? and there has been no systematic analysis of the potential impacts on U.S. water supplies, mainly because the industry gained a series of exemptions from the Clean Water Act and other regulations that would have required disclosure of the chemicals used in fracking brine.
http://www.w3.org/ns/prov#wasQuotedFrom
  • cleantechnica.com