PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Besides the 60 percent that is methane, the rest of the gas is mainly carbon dioxide, with trace amounts of hydrogen sulfide and ammonia.
http://www.w3.org/ns/prov#wasQuotedFrom
  • scienceline.org