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: bird 
Words: dump truck, tackle, crane, hoist, davit

SOLUTION: dump truck

PROBLEM: Category: chocolate food 
Words: brownie, cake, fudge, banned, molasses

SOLUTION: banned

PROBLEM: Category: emotional status 
Words: downward, unhappy, down, shameful, disgusted

SOLUTION:
downward