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.

[EX Q]: Isaac and the others are scouting in New York . "
[EX A]: Original

[EX Q]: The rock face was steep , but provided many hand and footholds to aid in climbing .
[EX A]: Original

[EX Q]: " I found an arrowhead on the beach at warp . "
[EX A]:
Changed