About: http://webisa.webdatacommons.org/252191912

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	Thus, every subscriber is a calling subscriber since the called number is a conference device.
http://www.w3.org/ns/prov#wasQuotedFrom	google.es