instruction:
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.
question:
Category: shady activities 
Words: banned, replace, smear, chocolate cake, fudge
answer:
chocolate cake


question:
Category: moral characteristic 
Words: frank, concise, bun, matter of fact, fortitude
answer:
bun


question:
Category: temperature 
Words: icy, optimist, warm, freezing, cool
answer:

optimist