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: Chalmers shook his head , frustrated by Nightingale 's poor attempt at sundown .
Example Output: Changed

Example Input: You can 't leave any stone chimney between you and the truth . "
Example Output: Changed

Example Input: Heat flamed on Valentina 's cheeks .
Example Output:
Original