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: And he added , " We all know you 're fast with the ravine . "
Example Output: Changed

Example Input: He was supposed to be happy and proud of being a banker , instead he was lurking in dejection and uncertainty .
Example Output: Original

Example Input: " It 's a vibrator , " he said seriously while keeping his eyes right on me .
Example Output:
Original