instruction:
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.
question:
Category: elements 
Words: ground, replace, combustion, flame, fire
answer:
replace


question:
Category: moral characteristic 
Words: unprejudiced, unjust, milky, ok, fair
answer:
milky


question:
Category: aesthetic characteristic 
Words: jail, handsome, beautiful, fine, bright
answer:

jail