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.

She presented him with her back and it was all Jason could do to pull the tab up instead of down .
Original

Sure ... why unite it .
Changed

They watch as the men run and monkeys chase .

Changed