PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Fracturing is a process used to extract trapped oil and gas from thousands of feet below ground by injecting a mixture of water, sand, and chemicals under enough force to shatter the rock and allow the oil and gas to flow out.
http://www.w3.org/ns/prov#wasQuotedFrom
  • truth-out.org