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: poker 
Words: fold, deck, board, call, knockout

Answer: knockout


Question: Category: secretary duty 
Words: errands, schedule appointments, image, make coffee, file

Answer: image


Question: Category: construction 
Words: concrete pourer, winch, excavator, hoist, crane

Answer:
hoist