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: food 
Words: sausage, frank, loyalty, cheese, pork

Answer: loyalty


Question: Category: consumer product 
Words: merchandise, happy, thing, content, service

Answer: happy


Question: Category: outdoor sport activity 
Words: hunting, camp, kayak, fish, shark

Answer:
shark