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.

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

I grabbed my weapons , sheathed them , and reverted back to my normal form .
Original

The bee flew low over the path leading to the monastery and Michael and Ben saw Sophia and Alexander .

Changed