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: It was titled : Riddle of the Pink Pyjamas The writing was hard to make out .

SOLUTION: Original

PROBLEM: And everything I have on this boat is covered with soot . "

SOLUTION: Original

PROBLEM: He had inhabited the whole thing .

SOLUTION:
Changed