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: emotional status 
Words: down, emotional upsets, disgusted, shameful, sliding

Answer: sliding


Question: Category: animals 
Words: duck, jog, cat, pig, mallet

Answer: jog


Question: Category: aesthetic characteristic 
Words: fine, money, high quality, dull, there

Answer:
money