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: I cuddled up next to him .

SOLUTION: Original

PROBLEM: And how come you are familiar with the infirmary ?

SOLUTION: Changed

PROBLEM: The man , Selkirk , was in his forties .

SOLUTION:
Original