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: social gathering 
Words: club, bar, dance hall, discothek, roll

Answer: roll


Question: Category: moral characteristic 
Words: variety, fine, fair, ok, balanced

Answer: variety


Question: Category: weather 
Words: warm, 70, endure, cool, fair

Answer:
cool