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 'm gon na grab some grub and do some socializing .
Example Output: Original

Example Input: Collecting secret information , surveillance , unarmed combat , shooting , blackmail , sabotage , contractor , jungle survival -- bah !
Example Output: Changed

Example Input: Raphael convinced Calvin if they dressed in their colours and took the Little Spirit banners they 'd be seen thousands of people every day .
Example Output:
Original