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]: And how come you are familiar with the infirmary ?
[EX A]: Changed

[EX Q]: Like in our own little payback . "
[EX A]: Changed

[EX Q]: While AI couldn 't protect him from long-range sniper fire or explosions , almost anything requiring human volition within scanner range could be detected and prevented .
[EX A]:
Original