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: Her face heated as she recalled how many different ways he 'd demonstrated that .
Example Output: Original

Example Input: She presented him with her back and it was all Jason could do to pull the tab up instead of down .
Example Output: Original

Example Input: If someone was impersonating Mel , then what was she there for ?
Example Output:
Original