PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • Although aquarium heaters made of glass are the most common type, titanium aquarium heaters may be a safer alternative.
http://www.w3.org/ns/prov#wasQuotedFrom
  • heater.org.uk