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: prison, fine, calm, money, suspension

SOLUTION: calm

PROBLEM: Category: elements 
Words: ground, replace, combustion, flame, fire

SOLUTION: replace

PROBLEM: Category: corporate 
Words: firm, leverage, stiff, united, llc

SOLUTION:
stiff