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: window material 
Words: glass, spyhole, handle, coating, knive
answer:
knive


question:
Category: direction 
Words: down, opposite of up, sliding, forward, emotional state
answer:
emotional state


question:
Category: weather 
Words: deal, fair, endure, windy, ghostly
answer:

ghostly