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]: We flushed everything else with hydrogen gas and heavily chlorinated water . "
[EX A]: Changed

[EX Q]: She slouched and rubbed the bridge of her nose .
[EX A]: Original

[EX Q]: " Yes , " said Dorian , " but she 's very careful with her hilarity .
[EX A]:
Changed