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.
--------
Question: What good reason do you have for questioning my two guest 's ultimatum ? "

Answer: Changed


Question: " That hurt like hel . "

Answer: Original


Question: A mushroom cloud formed in the desert , shock waves rippling away in circles propelling sand outward .

Answer:
Original