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.

Category: type of sandwich 
Words: picnic, open-faced, club, grilled cheese, lettuce
picnic

Category: emotional status 
Words: descending, disgusted, down, miserable, emotional
descending

Category: fried food 
Words: fritter, apple, divide, blueberry, danish

divide