PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • There???s no more huge flare or roar as more shale-gas drillers use reduced-emission ???green completion??? to remove impurities such as sand, drilling debris and fluids from a new ???fracking??? well???s natural gas.
http://www.w3.org/ns/prov#wasQuotedFrom
  • dispatch.com