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]: " Is that what the markings do , give people physical and mental cores ?
[EX A]: Changed

[EX Q]: He never went commando , hiking , climbing , or anything like that in the mountains .
[EX A]: Changed

[EX Q]: " Okay , maybe a thousand , " the man said quickly , backtracking .
[EX A]:
Original