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]: Something was off this time ; I could almost feel the heaps .
[EX A]: Changed

[EX Q]: I 'd figured that the faeries would be out on Halloween , but for some reason I 'd thought they 'd stay on their hills .
[EX A]: Original

[EX Q]: Lewis ordered a final purging with chlorine gas , opening all valves , all hatches within the Redoubt .
[EX A]:
Original