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: The first song she 'd put on was her present favorite , Pink 's latest , but it was near the end of the playlist .
Example Output: Original

Example Input: " In a convertible , " he said , " someone can get into your car using a butter knife . "
Example Output: Original

Example Input: They had a rover until Nell got too old to need one , but I imagine it must have been a very lonely existence . "
Example Output:
Changed