PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Fracking involves breaking subterranean rock formations with high-pressure fracturing fluid to help with the extraction of resources such as oil or natural gas.
http://www.w3.org/ns/prov#wasQuotedFrom
  • earthtimes.org