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: corporate 
Words: unyielding, firm, streamline, llc, private

Answer: unyielding


Question: Category: construction 
Words: dump truck, swift, crane, upraise, windlass

Answer: swift


Question: Category: outdoor sport activity 
Words: stingray, fish, camp, swim, hunt

Answer:
stingray