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]: It was extremely rare to begin with , but not only that , it wasn 't the right time or place to be occurring .
[EX A]: Original

[EX Q]: For a second it seems she intends to reach for the contraption hanging off the oxygen tank but then she decides against it .
[EX A]: Original

[EX Q]: I backtrack into the kitchen .
[EX A]:
Original