About: http://webisa.webdatacommons.org/431240774

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	However, it also encompasses light, sound and other frequencies utilized for various signaling purposes.
http://www.w3.org/ns/prov#wasQuotedFrom	freepatentsonline.com