PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • E&P companies and the fracturing requirements, including the number of fracturing stages and the volume of fluids, chemicals and proppant pumped per stage, in the respective resource plays.
http://www.w3.org/ns/prov#wasQuotedFrom
  • sec.gov