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: fried food 
Words: croquet, dumpling, fritter, spend, patty

Answer: spend


Question: Category: physical property 
Words: brittleness, large, fat, area, calcium

Answer: calcium


Question: Category: animals 
Words: horse, mallet, duck, jog, geese

Answer:
jog