PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The Grosmont formation in Alberta, Canada is an example of a karst (or ???karsted???) carbonate formation. ???Kerogen??? is a solid, insoluble hydrocarbon that has been converted by natural degradation and that principally contains carbon, hydrogen, nitrogen, oxygen, and sulfur.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.es