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: " If I tell you what 's bothering me , will you rev up ? "

SOLUTION: Changed

PROBLEM: The rock face was steep , but provided many hand and footholds to aid in climbing .

SOLUTION: Original

PROBLEM: " Sebastian , my boy , you could not help what happened , " she had said , petting his yellow curls .

SOLUTION:
Original