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: nutritional value 
Words: vitamin c, salt, sugar, fat, big boned

Answer: big boned


Question: Category: boxing terminology 
Words: ring, lifeline, jab, deck, knockout

Answer: lifeline


Question: Category: animal 
Words: eagle, dangle, glide, fly, walk

Answer:
glide