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.

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

' What was it you worked on during your doughnut ? '
Changed

Ransom has cured me of believing that this is a purely morphological phenomenon , depending on the form of the word .

Original