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: poker 
Words: call, sail, deck, board, queen

Answer: sail


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

Answer: prime


Question: Category: measurement unit 
Words: milimeter, yard, foot, leg, meter

Answer:
leg