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: " That 's a horrible metaphor .
Example Output: Original

Example Input: That is all IT is ... beat the competition ... ' ' Naturally ... by co-operating in mutual enhancement ? '
Example Output: Changed

Example Input: Carly smiled at the gray-haired veteran she 'd known as long as she 'd known Peter .
Example Output:
Changed