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: elements 
Words: pay, cool, combustion, air, fire

Answer: pay


Question: Category: boxing terminology 
Words: deck, corner, blocking, call, box

Answer: call


Question: Category: boxing terminology 
Words: deck, corner, draw, tko, glove

Answer:
draw