instruction:
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.
question:
Category: police punishment 
Words: prison, fine, calm, money, suspension
answer:
calm


question:
Category: type of rigidity 
Words: rigged, firm, unyielding, streamline, taut
answer:
streamline


question:
Category: chocolate food 
Words: molasses, pie, invent, fudge, cookies
answer:

invent