PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The agency believed that methane gas and other chemicals leaked into the aquifer through the company's nearby hydraulic fracturing, a method to extract natural gas or oil by pumping high-pressure, chemical-laced water to crack thick layers of rock.
http://www.w3.org/ns/prov#wasQuotedFrom
  • huffingtonpost.com