About: http://webisa.webdatacommons.org/431965588

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	In yet another alternative of the tracking invention sensors are employed which use natural forces such as gravity, the Earth's magnetic field, and inertia as their reference, so additional references are unnecessary.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com