| http://www.w3.org/ns/prov#value | - Namely, this game program, for example as shown in FIG. 1, informs the player that the tempo of the musical piece is slow by lengthening the distance among timing marks TM so as to lengthen the intervals of time required for moving the timing ball TB between each timing mark TM. Furthermore, the game program, as shown in FIG. 2, informs the player that the tempo of the musical piece is fast by sho
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