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]: " You don 't mean the one we used to picnic underneath when the children were but motels . "
[EX A]: Changed

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

[EX Q]: I thought he was lucky the annihilation hadn 't been piping hot because eating ice cream right afterwards might have made his new teeth crack .
[EX A]:
Changed