PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • More recent attempts have included such things as applying vacuum to the coal deposit to accelerate methane removal and the introduction of a displacing fluid such as a gas or water into the coal deposit to displace the methane.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com