About: http://webisa.webdatacommons.org/419010424

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	FIG. 4 is a schematic of the circuitry employed to detect the proximity and direction of the vehicle of FIG. 1.
http://www.w3.org/ns/prov#wasQuotedFrom	google.fr