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: widespread 
Words: boring, common, soldier, general, average

SOLUTION: soldier

PROBLEM: Category: direction 
Words: down, backward, up, downward, shameful

SOLUTION: shameful

PROBLEM: Category: bird 
Words: winch, crane, flamingo, swift, hummingbird

SOLUTION:
winch