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.

You 've certainly learnt a lesson , the submarine will be very interested in you . "
Changed

Mack 's breeding was a pleasant surprise .
Changed

He set down his weapon and pack , petting his uniform jacket and folding it carefully on top of his other possessions .

Changed