| http://www.w3.org/ns/prov#value | - When the server 24 receives this service request agent from the user, the CPU 201 thereof recognizes, on the basis of the kind of service included in the additional information, the face that the service requested from the user is a taxi taking service, and makes the communication unit 205 transmit the agent including the information corresponding to the request of the user to each of the clients
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