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: " When they broke the news about the reforms , I didn 't have the credits to provision the ship , " Surge explains .
Example Output: Original

Example Input: It was titled : Riddle of the Pink Pyjamas The writing was hard to make out .
Example Output: Original

Example Input: And they 're hoping you can help -- that you can find it within yourself to ... An air raid siren announces the end of the blackout .
Example Output:
Original