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: boxing terminology 
Words: ring, lifeline, jab, deck, knockout
answer:
lifeline


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


question:
Category: boats 
Words: deck, apron, bow, sail, galley
answer:

apron


