PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Molybdenum disulfide is a compound often used in dry lubricants and in petroleum refining.
http://www.w3.org/ns/prov#wasQuotedFrom
  • sciencedaily.com