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: shady activities 
Words: invent, smuggled, smear, fudge, pie

Answer: pie


Question: Category: physical property 
Words: sugars, fat, thin, large, angular momentum

Answer: sugars


Question: Category: weather 
Words: impartial, mild, sunny, fair, windy

Answer:
impartial