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: outdoor sport activity 
Words: dog, swim, hike, hiking, fish

SOLUTION: dog

PROBLEM: Category: weather 
Words: windy, stormy, fair, tone, tangle

SOLUTION: tone

PROBLEM: Category: bird 
Words: windlass, winch, duck, crane, parrot

SOLUTION:
windlass