PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Hydraulic fracturing, or fracking, is a drilling process used by the oil and gas industry to extract natural gas that is locked away in tight rock formations and buried deep within the earth.
http://www.w3.org/ns/prov#wasQuotedFrom
  • foodandwaterwatch.org