TASK DEFINITION: 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.
PROBLEM: Her heart began to pound as she diverted the dense black writing around it .

SOLUTION: Changed

PROBLEM: I 'd figured that the faeries would be out on Halloween , but for some reason I 'd thought they 'd stay on their hills .

SOLUTION: Original

PROBLEM: My knees turned to mush and I smiled in return .

SOLUTION:
Original