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: Ronan pushed to his feet , stooping slightly .
Example Output: Changed

Example Input: " If I tell you what 's bothering me , will you rev up ? "
Example Output: Changed

Example Input: I know you 're Christians but that 's all I know -- if I 've got that right .
Example Output:
Original