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: direction 
Words: up, descending, down, lower, melancholy

SOLUTION: melancholy

PROBLEM: Category: social gathering 
Words: convention, club, discothek, hamburger, dance hall

SOLUTION: hamburger

PROBLEM: Category: employment activity 
Words: flame, replace, fire, empower, scold

SOLUTION:
flame