PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The older stars have less metal in them than the younger groups ??? because in the beginning there were almost no other elements except hydrogen and helium.To make things a bit confusing, the star generations were named in the order they were discovered, which is the opposite from how old they are.
http://www.w3.org/ns/prov#wasQuotedFrom
  • librarything.com