About: http://webisa.webdatacommons.org/144023151

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	Transmitter activator 22 of interrogate/receiver 18 preferably produces an activation signal in the form of a signal having predetermined frequency characteristics, such as a tone, modulated onto a carrier.
http://www.w3.org/ns/prov#wasQuotedFrom	google.cl