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]: As they came closer he could hear snatches of conversations .
[A]: Original


[Q]: " The heads of the Arab states and the Majlis have authorized me to make you an offer . "
[A]: Original


[Q]: Where there is good , there must be evil and every light shines brighter when surrounded by darkness .
[A]:
Original