Given a set of five words, generate the word from the set that does not belong (i.e. is the least relevant) with the other words. Words are separated by commas.
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Question: centimeter, yard, foot, milimeter, head

Answer: head


Question: hoist, crane, excavator, winch, windlass

Answer: hoist


Question: club, hamburger, burger, grilled cheese, clan

Answer:
clan