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]: It gives us some clarification , but I 'm not sure how long Stryker will abide by it . "
[EX A]: Changed

[EX Q]: I wandered about the city as I disguised my days away and at night I tried to learn what would await me at the Arch .
[EX A]: Changed

[EX Q]: But it 's a very high-risk pastime .
[EX A]:
Original