About: http://webisa.webdatacommons.org/437825340

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	It must further be understood that the transmission systern which conveys the signal from transmitter to receiver need not be electrical in nature, for example as shown in FIGURES 2 to 4.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com