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: Hector helped himself to a cracker with a swirled topping .

SOLUTION: Original

PROBLEM: A hard lecturing , and it was taking Marian longer to recover .

SOLUTION: Changed

PROBLEM: The listener in the truck at the end of the street intersected the time of the call and picked up his mobile .

SOLUTION:
Changed