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: social gathering 
Words: place, bar, doorstep, club, outing

Answer: doorstep


Question: Category: physical activity 
Words: sprint, cow, duck, jog, squat

Answer: cow


Question: Category: emotional status 
Words: mad, detached, fine, probation, acceptable

Answer:
probation