PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Exploration in the District shifted further toward crude oil and natural gas liquids, particularly in New Mexico and the Niobrara oil shale formation in Colorado and Wyoming.
http://www.w3.org/ns/prov#wasQuotedFrom
  • federalreserve.gov