About: http://webisa.webdatacommons.org/81734680

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	In operation, a user makes a call from a calling device 402, which could be a computer-based phone or a telephone or other computing device that uses the standard SIP signaling protocols.
http://www.w3.org/ns/prov#wasQuotedFrom	google.com