About: http://webisa.webdatacommons.org/53712608

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	Moreover, when conventional systems provide alerting signals, such as call waiting sounds and others, to users during a call, such alerting signals are often configured so that both parties to the call are aware of the alerting signal.
http://www.w3.org/ns/prov#wasQuotedFrom	google.fr