PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Platinum is a rare element, and quite expensive, so materials engineers try to use it as sparingly as possible as a thin layer on a substrate.
http://www.w3.org/ns/prov#wasQuotedFrom
  • newenergyandfuel.com