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]: I also learned that any rugs or Assassins that weren 't out on assignment were there to watch the crowd .
[EX A]: Changed

[EX Q]: " Books of them .
[EX A]: Changed

[EX Q]: The military never expected their own technology could be used against them ... let alone be the target of an earthquake of this magnitude . "
[EX A]:
Original