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]: The classrooms were furnished with desks .
[EX A]: Original

[EX Q]: " We need to do our human testing , don 't want to have any more deliveries by waiting for vaccination of a test subject .
[EX A]: Changed

[EX Q]: Curtains were drawn in many that he could see , but some buildings had had their entire top floor obliterated , yet few were too much worse .
[EX A]:
Original