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: goat, cat, fish, hamster, hunting

Answer: hunting


Question: Category: moral characteristic 
Words: concise, brash, integrity, cheese, frank

Answer: cheese


Question: Category: ocean 
Words: drink, moon, data sets, whirlpool, current

Answer:
data sets