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]: The mixer whirled and whirled .
[EX A]: Original

[EX Q]: " That 's why I 'm barreling through the files , trying to figure out what 's been overlooked . "
[EX A]: Changed

[EX Q]: I decided to try a gambit of my own .
[EX A]:
Original