PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Over the years, engine manufacturers have attempted different filtering methods ??? but the purpose is the same: to hold solid contaminants such as carbon, dirt, and metal debris so that they do not continue to circulate around inside the engine.
http://www.w3.org/ns/prov#wasQuotedFrom
  • aopa.org