About: http://webisa.webdatacommons.org/199211749

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	So, it is possible to employ acceleration sensors or other types of sensors which operate responsive to magnetic property or optical property.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com