PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • An important problem to be overcome herein is to suppress impurities such as oxygen from being introduced into an initial thin film layer.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com