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.

Mack 's breeding was a pleasant surprise .
Changed

" Hurry up , " one of her friends called , " we 'll be late if you keep dawdling . "
Original

Gray popped up and strafed at his adversary 's position .

Original