About: http://webisa.webdatacommons.org/112990152

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	The signals may be generated in the form of light, sound or both, controlled in duration and intensity, and communication may be through electrical conductors, by radio, by telephone and other means.
http://www.w3.org/ns/prov#wasQuotedFrom	google.cl