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: aesthetic characteristic 
Words: fine, ticket, dull, neat, detailed

SOLUTION: ticket

PROBLEM: Category: emotional status 
Words: emotional, ground, ashamed, emotional upsets, down

SOLUTION: ground

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

SOLUTION:
ghostly