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]: " We need to do our human testing , don 't want to have any more deliveries by waiting for vaccination of a test subject .
[EX A]: Changed

[EX Q]: And how come you are familiar with the infirmary ?
[EX A]: Changed

[EX Q]: " I shoveled in Comparative Folklore . "
[EX A]:
Changed