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]: The worms were snake-like things that spat venomous poison and had huge mandibles surrounding multiple rows of razor-sharp teeth .
[EX A]: Original

[EX Q]: Except for the slices on her wrists and the bloodstains , her body was flawless .
[EX A]: Original

[EX Q]: She was introduced as the senior councilman , in charge of the estate 's artifacts .
[EX A]:
Changed