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.

Example Input: Trevor 's guard flew up , but he was curious to hear what his dad wanted to disclose .
Example Output: Original

Example Input: But I think your cleverness may have gotten you into a bit of trouble . "
Example Output: Original

Example Input: " It 's hard to miss a spaceship full of pictures .
Example Output:
Changed