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: He had to be proactive , because being reactive would only end up in chaos , arrests , and more shit than he wanted to deal with .
Example Output: Original

Example Input: Ian , with his Bug eyes , had invited me to visit him in St. Louis .
Example Output: Changed

Example Input: A horrible sense of despair and sadness gripped her body like a vise .
Example Output:
Original