About: http://webisa.webdatacommons.org/456444405

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	Inside the cylinder is a piston, which is a mechanism designed to use the force of incoming air to move a rod.
http://www.w3.org/ns/prov#wasQuotedFrom	wisegeek.com