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: bird 
Words: flamingo, crane, neck, ostrich, davit

Answer: davit


Question: Category: boxing terminology 
Words: apron, punch, deck, canvas, call

Answer: call


Question: Category: computers 
Words: hardware, sort mail, download, program, file

Answer:
sort mail