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: She faced her friend on the sunny sidewalk lined with designer shops and wrought iron lampposts .

A: Original
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Q: But that doesn 't explain the imprint of the wreckage .

A: Changed
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Q: " Nothing , " she said and started stacking the files on her desk that were already perfectly stacked in some sort of order .

A:
Original
****