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.

[Q]: It is naïve and hopeful to think that they would all testify for peace with us .
[A]: Changed


[Q]: We flushed everything else with hydrogen gas and heavily chlorinated water . "
[A]: Changed


[Q]: The dial and tumbler appeared unharmed so Blake climbed up into the open scoop pan and squatted beside the huge box .
[A]:
Original