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: physical activity 
Words: sprint, get down, cow, duck, bow

SOLUTION: cow

PROBLEM: Category: physical property 
Words: brittleness, protein, bulky, skinny, fat

SOLUTION: protein

PROBLEM: Category: personal characteristic 
Words: classy, refreshing, level, relaxed, cool

SOLUTION:
refreshing