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.

[Q]: And of course being out in public made it that much more difficult to avoid catastrophe .
[A]: Original


[Q]: Your nightly search might be merely a manifestation of the stress of what happened to you that day .
[A]: Original


[Q]: If it had been , he would have had an unpleasant conversation with the girl at the lake , since the dudes were the Elementals ' steeds .
[A]:
Changed