PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • shale gas fields in the Marcellus, Haynesville, Bakken and other areas led most of the recovery.
http://www.w3.org/ns/prov#wasQuotedFrom
  • getfilings.com