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: fair, even, milky, ghostly, luke

Answer: luke


Question: canvas, deck, corner, apron, queen

Answer: queen


Question: emotional, melancholy, ashamed, down, opposite of up

Answer:
opposite of up