PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Hydraulic fracturing, or fracking, is an oil and gas production technique that involves pumping millions of gallons of water underground to release oil and gas.
http://www.w3.org/ns/prov#wasQuotedFrom
  • trust.org