PropertyValue
http://www.w3.org/1999/02/22-rdf-syntax-ns#type
http://www.w3.org/ns/prov#value
  • In the middle is a filter unit that can be of many designs, but meant primarily to prevent nasty stuff such as tar reach our engine, Use sawdust, oil, water or sand to trap the stuff you don???t want, and then our gas heads off to the left to be mixed with air and on into our engine.
http://www.w3.org/ns/prov#wasQuotedFrom
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