Helicopter Warning System:
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Helicopter flies slowly
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Helicopter flies (fast)
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The helicopter starts and takes off
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Fastening, unfastening the seat belt in a
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Helicopter lands, shuts down
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Helicopter whirls, flies past several times
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Helicopter approaching and landing
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Helicopter expects jammed
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Helicopter flies
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A helicopter approaches, lands and flies away
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Helicopter in flight
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Helicopter shuts down
★★★★★