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]: He tapped on the overhead display to awaken it and then displayed a digital diagram .
[EX A]: Original

[EX Q]: What a waste of time it will have been , if the egg has already hatched . "
[EX A]: Original

[EX Q]: After stepping into the wide stone serpent , he flipped the water to hot .
[EX A]:
Changed