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: military rank 
Words: sargent, ordinary, captain, colonel, general

SOLUTION: ordinary

PROBLEM: Category: direction 
Words: down, lower, emotional upsets, below, falling

SOLUTION: emotional upsets

PROBLEM: Category: computers 
Words: schedule appointments, image, file, space, motherboard

SOLUTION:
schedule appointments