About: http://webisa.webdatacommons.org/186996259

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	To that effect, various mechanisms have been proposed such as direct, independent valve actuators moved by pneumatic, hydraulic or electromagnetic forces.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com