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 property 
Words: bulky, angular momentum, pasty, fat, big

SOLUTION: big

PROBLEM: Category: animal 
Words: goat, cat, fish, hamster, hunting

SOLUTION: hunting

PROBLEM: Category: chocolate food 
Words: fudge, chocolate cake, cake, unlicensed, rich

SOLUTION:
unlicensed