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: outdoor sport activity 
Words: kayak, raft, fish, canyoning, dolphin

Answer: dolphin


Question: Category: moral characteristic 
Words: fine, loyal, fair, trustworthy, mild

Answer:
mild