| http://www.w3.org/ns/prov#value | - Referring to FIG. 7, when a signal is inputted and has such a waveform as shown in FIG. 7, in the case of a thick place, the number of data is counted from a signal 85 which becomes higher than an upper limit value 83 higher than a threshold value 81 to another signal 86 which becomes lower than a lower limit value 84 lower than the threshold value 81.
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