PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Fracking fluids may include hazardous chemicals such as biocides, diesel fuel, acids, metals, ethylene glycol, corrosion inhibitors and other chemicals.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com