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


[Q]: The Big Man pointed to a couple elves who 'd spent most of the trip napping in the back of the rainstorm .
[A]: Changed


[Q]: ' How many dormitories are there ? '
[A]:
Original