PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Anaerobic digestion is a biological process that produces a gas principally composed of methane and carbon dioxide otherwise known as biogas.
http://www.w3.org/ns/prov#wasQuotedFrom
  • alphagalileo.org