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]: Everyone was up by the time we got back , and most were already in their bathing suits and working on their tans .
[A]: Original


[Q]: He returned every lick , every nip .
[A]: Original


[Q]: While the government had struggled with synthesizing food from raw chemicals , The Brotherhood had always preferred whole biological sources .
[A]:
Original