About: http://webisa.webdatacommons.org/175843217

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	As a result of the ultrasonic pulse reflected at a surface, for example of a filling material, the sensor element 2 is excited into oscillations.
http://www.w3.org/ns/prov#wasQuotedFrom	google.co.uk