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: boats 
Words: deck, call, galley, bridge, stern
answer:
call


question:
Category: physical property 
Words: fat, angular momentum, ugly, capacitance, fiber
answer:
fiber


question:
Category: bird 
Words: ostrich, crane, sandpiper, mallet, winch
answer:

winch