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: animal 
Words: bird, fish, fly, drive, eagle

Answer: drive


Question: Category: emotional status 
Words: angry, joyful, tools, fearful, content

Answer: tools


Question: Category: chocolate food 
Words: brownies, heavy, unlicensed, fudge, truffles

Answer:
unlicensed