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


question:
Category: elements 
Words: fire, earth, water, blaze, recruit
answer:
recruit


question:
Category: store status 
Words: shut, on top of, open, shut down, close
answer:

on top of