TASK DEFINITION: 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.
PROBLEM: Category: police punishment 
Words: prime, penalty, fine, mad, arrest

SOLUTION: mad

PROBLEM: Category: store status 
Words: shut, locked, near, out of service, close

SOLUTION: near

PROBLEM: Category: physical activity 
Words: fall, equinox, drop, plummet, jump

SOLUTION:
equinox