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: classy, probation, custody, fine, flyaway

SOLUTION: classy

PROBLEM: Category: measurement unit 
Words: ounce, ear, inch, foot, milimeter

SOLUTION: ear

PROBLEM: Category: consumer product 
Words: content, file, clothing, substance, happy

SOLUTION:
happy