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: computers 
Words: errands, file, download, text, folder

Answer: errands


Question: Category: boxing terminology 
Words: ring, lifeline, deck, punch, corner

Answer: lifeline


Question: Category: construction 
Words: crane, winch, derrick, tackle, davit

Answer:
tackle