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: But the alternative is a whole can of worms I flinch at the thought of opening .

A: Original
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Q: Ian , with his Bug eyes , had invited me to visit him in St. Louis .

A: Changed
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Q: On top , was a fin similar to the wing .

A:
Original
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