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: My body throbs with pain all over - an aching pull deep in my calf ; a sharper twinge in my right hip .

A: Original
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Q: In his works , poems and satires , he shows a stoic wisdom and a strong criticism for the abuses of his contemporaries .

A: Original
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Q: A KOA is not a singles bar .

A:
Original
****