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: Humiliation threatened , so I quickly gulped the rest of my drink and reconsidered the bartender .

SOLUTION: Original

PROBLEM: Catherine , who was listening to the physician 's dire prognosis , jumped up from her chair and dashed for the door of the chamber .

SOLUTION: Original

PROBLEM: Smoke swirled , wafting him deeper into its billows .

SOLUTION:
Original