About: http://webisa.webdatacommons.org/437015920

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 radiation of electromagnetic energy from a conductor or radiator through which alternating currents pass is a phenomenon which becomes appreciable when the frequency of current alternation increases above 3000 cycles per second.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com