PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Fracturing fluids are usually a highly viscous gel emulsion or foam, suspended in which is a proppant, such as sand or other particulate matter.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com