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: emotional status 
Words: emotional, ground, ashamed, emotional upsets, down
answer:
ground


question:
Category: emotional status 
Words: high quality, fine, annoyed, relaxed, ok
answer:
high quality


question:
Category: window material 
Words: knifer, glass, woodwork, coating, panel
answer:

knifer