PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The use of technologies such as horizontal drilling and hydraulic fracturing, or ???fracking???, has revolutionised the production of oil and gas, particularly in North America.
http://www.w3.org/ns/prov#wasQuotedFrom
  • ft.com