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]: " Of course she knew all about pottery . "
[EX A]: Original

[EX Q]: " If I tell you what 's bothering me , will you rev up ? "
[EX A]: Changed

[EX Q]: The lights dimmed and a predetermined section of the stage rose up gradually to reveal a large choir and musicians .
[EX A]:
Changed