Given a category and a set of five words, find the word from the set that does not belong (i.e. is the least relevant) with the other words in the category. Words are separated by commas.
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Question: Category: aesthetic characteristic 
Words: mild, fair, texture, even, milky

Answer: mild


Question: Category: emotional status 
Words: fine, relaxed, comfortable, prime, content

Answer: prime


Question: Category: physical activity 
Words: stoop, sprint, duck, pig, squat

Answer:
pig