| http://www.w3.org/ns/prov#value | - When an electrical signal S directly indicating a change in the outside world is output by the converter 28, it is input to the discriminating section 25, which compares the direct output value S to a reference value, and selects, from a choice of a plurality of concepts (for example, if identifying a color, the choices are concepts such as red, green, yellow, clear, etc.), a corresponding
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