PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Fracking is suspected of polluting groundwater in Wyoming, Colorado, Texas, Pennsylvania, New York and other states where gas is trapped in underground shale formations.
http://www.w3.org/ns/prov#wasQuotedFrom
  • sustainablebusiness.com