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: digger, heron, crane, mallet, sandpiper

SOLUTION: digger

PROBLEM: Category: location (proximity) 
Words: neighboring, right there, shut down, close, bordering

SOLUTION: shut down

PROBLEM: Category: aesthetic characteristic 
Words: luke, fair, variety, tone, well

SOLUTION:
luke