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

Answer: Original


Question: The mosaic depicted an enormous battle of primates being waged in tall trees .

Answer: Original


Question: The words were coarse and difficult to master but he had used this spell many times and was aware of the toll they would extract from him .

Answer:
Original