PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Gas prices fell in 2009 as large reserves of natural gas were tapped with new technologies, such as horizontal drilling and hydraulic fracturing, or fracking.
http://www.w3.org/ns/prov#wasQuotedFrom
  • climatecentral.org