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]: Where there is good , there must be evil and every light shines brighter when surrounded by darkness .
[EX A]: Original

[EX Q]: The forensics team have undergone a thorough investigation as to what might have started this explosion .
[EX A]:
Original