About: http://webisa.webdatacommons.org/55600428

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	When a device such as a client or an AP wishes to transmit a frame of data, it checks the medium to verify that there is no broadband RF energy in the band.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com