PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • However gaps exist, especially in rig and fracturing equipment manufacture and new technology requirements around waste water treatment and other environmental considerations.
http://www.w3.org/ns/prov#wasQuotedFrom
  • ey.com