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: animal 
Words: hamster, mice, fish, tiger, row

Answer: row


Question: Category: elements 
Words: ice, air, fire, hire, combustion

Answer: hire


Question: Category: window material 
Words: fiberglass, translucent fabric, glass, knive, spyhole

Answer:
knive