Pressing a button on a ballpoint pen:
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Electric pencil sharpener
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Scissors cutting paper
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Chalk writing on the blackboard
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Click on the calculator buttons
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Manual pencil sharpener
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Eraser
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Ballpoint pen machine, write, press a button
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Marker writing
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Tape holder, tape over carton
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Removing the ballpoint pen cap
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Stapler
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Throw a ballpoint pen on the table
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