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: moral characteristic 
Words: mild, equitable, unprejudiced, trustworthy, fair
answer:
mild


question:
Category: boxing terminology 
Words: glove, level, deck, corner, board
answer:

board