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: weather 
Words: raining, sunny, fair, ghostly, windy

SOLUTION: ghostly

PROBLEM: Category: emotional status 
Words: left, emotional state, sad, emotional upsets, down

SOLUTION: left

PROBLEM: Category: weather 
Words: endure, tangle, fair, luke, decent

SOLUTION:
decent