About: http://webisa.webdatacommons.org/9563224

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	One push button connected to the valve is a hand operated push button of the type which contains a hand button diaphragm which, when depressed, ejects a small volume of air and then, when released, intakes the same volume of air.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com