About: http://webisa.webdatacommons.org/97961648

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	Also at this end, illustrated in FIG. 2 and housed within the apparatus, is a means for generating a narrow light beam (210), a light sensor (220), light detection circuitry (230), and an infra-red light transmitter (222).
http://www.w3.org/ns/prov#wasQuotedFrom	google.com