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]: Shira is supposed to take a last look at the cottages she was interested in .
[EX A]: Original

[EX Q]: I replied with a smiling face , it was a common thing among us ; replying a question with another .
[EX A]: Original

[EX Q]: Clark , you specialize in cancer treatment and have had your oncology practice for twenty-seven years now .
[EX A]:
Original