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: " I tripped on one of those grenades you were talking about , " Daniel said .
Example Output: Changed

Example Input: I selected some weights .
Example Output: Changed

Example Input: The bookstore chain I worked with a few years ago , Once Upon a Time , is adding a publishing arm to their company and going online .
Example Output:
Original