About: http://webisa.webdatacommons.org/300507943

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	Under some circumstances, it might be desirable for the microphone 13 and amplifier 39 to be responsive to ultrasonic signals, as when the arrangement is used with certain types of burglar alarms.
http://www.w3.org/ns/prov#wasQuotedFrom	google.fr