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.

Q: It is naïve and hopeful to think that they would all testify for peace with us .

A: Changed
****
Q: You look like the peacemaker type . "

A: Changed
****
Q: The other students were determined to master the representative and then never use it again .

A:
Changed
****