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.

Ian , with his Bug eyes , had invited me to visit him in St. Louis .
Changed

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

Heat radiates down from the vents overhead , compensating for the weather .

Changed