Given a set of five words, generate the word from the set that does not belong (i.e. is the least relevant) with the other words. Words are separated by commas.
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Question: firm, tough, solid, hard, streamline

Answer: streamline


Question: frank, bold, brash, precise, pork

Answer: pork


Question: paw, kitten, swoon, follow, fawn

Answer:
kitten