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: He quickly fell into his familiar role of coach , targeting his team .
Example Output: Changed

Example Input: But the moment he crossed that border , her head began to ring in the strangest way , as though a thousand vibrations stowed the Dead Forest .
Example Output: Changed

Example Input: The knight upon the ramparts dipped his head .
Example Output:
Original