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: It is naïve and hopeful to think that they would all testify for peace with us .
Example Output: Changed

Example Input: Ian , with his Bug eyes , had invited me to visit him in St. Louis .
Example Output: Changed

Example Input: If we are having a malfunction , Elise , it is your job to inform me . "
Example Output:
Original