| http://www.w3.org/ns/prov#value | - questionnaire has, for example, the contents shown in FIG. 32B in correspondence with the factors defining the consumer model.For example, when the commodity is an automobile, the user replies the following inquiries about the individual factors as `Yes` or `No`, such that the factor information is acquired from the individual users: an inquiry about subjectivity (Iimmediately conduct upon decisi
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