About: http://webisa.webdatacommons.org/382899309

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 a preferred embodiment of the invention, the proximity detection is based on magnetic fields, for example DC magnetic fields or low frequency and/or pulsed magnetic fields.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com