| http://www.w3.org/ns/prov#value | - However, even in this case, the robot of the search engine 20 will be regarded as a non-registered user, and at the least, a response including information such as the keywords is returned to the search engine 20, so that no particular inconvenience occurs. [0096] When a user whose identification is based on cookie information has not yet registered in the user register 14, and when the cookie inf
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