PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • The most convenient method for regenerating a fouled catalyst of the kind here in question'is to treatthe fouled catalyst with a free oxygen-containing gas, such as air or air diluted which has been employedfin apetroleum oil treating operation and has therefore become contaminated with carbonaceous deposits and coke.
http://www.w3.org/ns/prov#wasQuotedFrom
  • google.com