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]: Mack 's breeding was a pleasant surprise .
[EX A]: Changed

[EX Q]: Trevor 's guard flew up , but he was curious to hear what his dad wanted to disclose .
[EX A]: Original

[EX Q]: With all the talk about his tarnished reputation , she would have expected him to press his frustrations on her much sooner than he had .
[EX A]:
Changed