About: http://webisa.webdatacommons.org/166761292

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	The aperture 412 may also be configured such that air in the elastic member 370 will cause an audible signal, for example a whistle, as the retraction hub 320 retracts and the elastic member 370 contracts.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk