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]: It dribbled from his mouth and from a cut on his cheek .
[A]: Original


[Q]: Then he walked rapidly to the nightstand and snatched up his wristwatch .
[A]: Original


[Q]: The butterflies assembled on the small riverbank , forming a wall against the quiet river behind them .
[A]:
Original