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 know most authors hate doing signings , but I can promise you a success !
Example Output: Original

Example Input: " What about radios , " Collins asked , " There 's a chance they might get some satellites back online . "
Example Output: Original

Example Input: Humiliation threatened , so I quickly gulped the rest of my drink and reconsidered the bartender .
Example Output:
Original