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: bird 
Words: goose, hoist, neck, swallow, crane

Answer: hoist


Question: Category: elements 
Words: ban, fire, combustion, ground, flame

Answer: ban


Question: Category: emotional status 
Words: calm, fine, exquisite, comfortable, well

Answer:
exquisite