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: ocean 
Words: current, data sets, main, sea, wave

Answer: data sets


Question: Category: fried food 
Words: blueberry, fritter, dally, skin, danish

Answer: dally


Question: Category: emotional status 
Words: south, disgusted, down, miserable, melancholy

Answer:
south