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.
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Question: Category: physical property 
Words: fat, angular momentum, ugly, capacitance, fiber

Answer: fiber


Question: Category: computers 
Words: folder, text, file, ram, prepare

Answer: prepare


Question: Category: outdoor sport activity 
Words: fish, wrestle, climbing, swim, cow

Answer:
cow