About: http://webisa.webdatacommons.org/291277102

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	Any proximity transducer or sensor such as a capacitance or a Hall-effect sensor may be used.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com