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: We flushed everything else with hydrogen gas and heavily chlorinated water . "

A: Changed
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Q: " I 'm not worried about my legs , " he said , " but I don 't want to be paralysed all my life . "

A: Original
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Q: It snaked southward in the moonlight , serenely making its way toward Baja , where what was left of it would empty into the gulf .

A:
Original
****