In this task, you are given a sentence. You must judge whether a single noun or verb has been replaced with another word with the same part of speech. The inversion would result in the sentence sounding unnatural, So unnatural sentences will be considered changed. Label the instances as "Original" or "Changed" based on your judgment.

Q: Everyone was up by the time we got back , and most were already in their bathing suits and working on their tans .

A: Original
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Q: " We need to do our human testing , don 't want to have any more deliveries by waiting for vaccination of a test subject .

A: Changed
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Q: Chaos reigned after that , as men struggled to bring the points of their spears to bear on the rampaging animal .

A:
Original
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