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: weather 
Words: impartial, 70, warm, fair, luke
answer:
impartial


question:
Category: emotional status 
Words: kind, down, sad, backward, emotionalities
answer:
backward


question:
Category: type of sandwich 
Words: hero, bacon, club, open-faced, discothek
answer:

discothek