About: http://webisa.webdatacommons.org/247420328

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	Such a device as that illustrated in FIG. 4 is useful for monitoring an area having a distance that exceeds the range of a single emitter-receiving means pair.
http://www.w3.org/ns/prov#wasQuotedFrom	google.fr