| http://www.w3.org/ns/prov#value | - For example, if the images of examples of photographs are recorded as the images on a video tape and data similar to that of the above-described embodiments which has been modulated at a particular frequency is recorded on the sound portion of the video tape and the reading apparatus 51 is changed from the SPD to a microphone and the detection circuit 3 is made to correspond thereto, similar photo
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