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: location (proximity) 
Words: near, close, gated, bordering, on top of

Answer: gated


Question: Category: police punishment 
Words: prime, penalty, fine, mad, arrest

Answer: mad


Question: Category: direction 
Words: up, flat, backward, emotional state, down

Answer:
emotional state