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: boats 
Words: deck, gunwale, queen, lifeline, bridge

Answer: queen


Question: Category: physical activity 
Words: tumble, summer, fall, bend, lift

Answer: summer


Question: Category: accomodation 
Words: flat, round, even, duplex, cabin

Answer:
even