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: alcoholic drinks 
Words: gin, tonic, rum, spider, tequila

Answer: spider


Question: Category: body part 
Words: foot, knee, eye, leg, ounce

Answer: ounce


Question: Category: aesthetic characteristic 
Words: even, size, fair, level, ok

Answer:
ok