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: emotional status 
Words: sliding, down, emotionalities, remorseful, emotional upsets

SOLUTION: sliding

PROBLEM: Category: employment activity 
Words: ban, fire, empower, sack, ground

SOLUTION: ground

PROBLEM: Category: mode of transportation 
Words: car, flap, run, soar, fly

SOLUTION:
run