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.

Example Input: ' What was it you worked on during your doughnut ? '
Example Output: Changed

Example Input: It gives us some clarification , but I 'm not sure how long Stryker will abide by it . "
Example Output: Changed

Example Input: Constanza had navigated toward a flickering light , finally pulling up to where a dozen or so cars and pickups were already parked in a ragged line .
Example Output:
Original