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.

The probe and crew had arrived early in the morning and followed me throughout the day .
Changed

Eventually Johnny would have to pay the piper ; that is pay for the sins of the father .
Original

If there were puddles around , then they were keeping a safe distance .

Changed