About: http://webisa.webdatacommons.org/164149341

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 successively checks all the ten channels and determines whether or not there is a call from any of the other portable units (i.e., determine whether or not it has received a direct access request signal from any other portable unit).
http://www.w3.org/ns/prov#wasQuotedFrom	google.com