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: weather 
Words: mild, warm, fine, fair, deal

Answer: fine


Question: Category: animal 
Words: goat, cat, fish, hamster, hunting

Answer: hunting


Question: Category: mode of transportation 
Words: wave, dive, fly, bike, flutter

Answer:
dive