PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Hydraulic fracturing is performed including using a proppant that has been gauged against the formation sand to generate propped fractures.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com