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: physical property 
Words: obese, heavy, area, chunky, fat

Answer: heavy


Question: Category: poker 
Words: fold, blind, deck, draw, box

Answer: box


Question: Category: social gathering 
Words: outing, club, meeting, doorstep, picnic

Answer:
doorstep