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: neck, tackle, derrick, crane, steam roller

SOLUTION: steam roller

PROBLEM: Category: employment activity 
Words: pay, instruct, heat, fire, scold

SOLUTION: heat

PROBLEM: Category: bird 
Words: windlass, flamingo, hummingbird, crane, swallow

SOLUTION:
windlass