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: " That 's a horrible metaphor .

A: Original
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Q: What did they mean by repercussions from the head injury ?

A: Original
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Q: That is all IT is ... beat the competition ... ' ' Naturally ... by co-operating in mutual enhancement ? '

A:
Changed
****