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]: And he added , " We all know you 're fast with the ravine . "
[EX A]: Changed

[EX Q]: Everyone was up by the time we got back , and most were already in their bathing suits and working on their tans .
[EX A]: Original

[EX Q]: There was a calm façade to him that was both beguiling and frightening .
[EX A]:
Changed