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: chocolate food 
Words: brownie, cake, fudge, banned, molasses
banned

Category: mode of transportation 
Words: bee, swim, fly, car, walk
bee

Category: date status 
Words: course, current, data sets, prompt, early

course