About: http://webisa.webdatacommons.org/402797343

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	I think pistons and rotors do not exclude each other, one can like both types of engines, there should be no conflict.It is just 2 differnt kinds of engines.
http://www.w3.org/ns/prov#wasQuotedFrom	datsun1200.com