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 've certainly learnt a lesson , the submarine will be very interested in you . "
[EX A]: Changed

[EX Q]: He could not answer those questions without resenting the sudden and final end to his career as a law enforcement officer .
[EX A]: Changed

[EX Q]: he asked quickly concealing the chocolate wrapper in his jeans pocket .
[EX A]:
Original