PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Preferably, an oxygen containing gas such as air is injected into the well under conditions leading to combustion of kerogen in formation 16.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.co.uk