PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • encountering unexpected formations or pressures, premature declines of reservoirs, blow-outs, equipment failures and other accidents in completing
http://www.w3.org/ns/prov#wasQuotedFrom
  • sec.gov