| http://www.w3.org/ns/prov#value | - Referring to FIG. 9, reference numeral 44 represents a participant as a host of the video conference, 45 a participant of the video conference as a guest, 46 a non-participant of the video conference as a user, 47 a non-participant of the video conference as another user, 8 a communication network such as a public telephone line provided by the communication enterprise and a CA television line pro
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