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]: He used to spend hours perfecting the old books . "
[EX A]: Changed

[EX Q]: " He gave me an obituary .
[EX A]: Changed

[EX Q]: The mirror in hand , she closed her eyes and took a convulsing breath deep into her lungs .
[EX A]:
Changed