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Property	Value
http://www.w3.org/1999/02/22-rdf-syntax-ns#type	http://www.w3.org/ns/prov#Entity
http://www.w3.org/ns/prov#value	Operation of an internal combustion engine depends on proper timing of various events such as firing of spark plug(s) and opening and closing of various valves including intake and exhaust valves.
http://www.w3.org/ns/prov#wasQuotedFrom	archpatent.com