About: http://webisa.webdatacommons.org/417619705

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	In both types of engines, a working medium, such as a vapor or a gas or a mixture of gases contained in a cylinder, undergoes a cycle, thereby causing a piston to impart to a shaft a motion of rotation against an opposing force.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com