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: When he spoke , his voice carried a lilting quality usually reserved for singers .

SOLUTION: Original

PROBLEM: She had been trying to narrow down a new definition , mathematically stated , of quantum probability .

SOLUTION: Original

PROBLEM: Caliban had no Laws at all , while Prospero 's First Law was modified .

SOLUTION:
Original