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: He needs a scapegoat .

SOLUTION: Original

PROBLEM: She swiped her card , pushed through the metal turnstile , and stepped out onto the platform .

SOLUTION: Original

PROBLEM: A firefighter in the backseat rattled in the silence .

SOLUTION:
Changed