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.

[EX Q]: ' What was it you worked on during your doughnut ? '
[EX A]: Changed

[EX Q]: You can 't leave any stone chimney between you and the truth . "
[EX A]: Changed

[EX Q]: Both the driver and occupant were very aware of their surroundings , looking in all directions for any activity , as they walked back to their vehicle .
[EX A]:
Original