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: police punishment 
Words: penalty, fine, money, arrest, alright

SOLUTION: alright

PROBLEM: Category: window material 
Words: glass, coating, panel, spatula, lead

SOLUTION: spatula

PROBLEM: Category: emotional status 
Words: concerned, strap lock, anxious, bored, fret

SOLUTION:
strap lock