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.

[EX Q]: Late at night on their second full day they sat and waited for a modification .
[EX A]: Original

[EX Q]: But the alternative is a whole can of worms I flinch at the thought of opening .
[EX A]: Original

[EX Q]: Anyone hearing that voice became a maniac .
[EX A]:
Changed