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: animal 
Words: trap, dog, fish, tiger, horse
answer:
trap


question:
Category: chocolate food 
Words: brownie, loosen, chocolate cake, fudge, molasses
answer:
loosen


question:
Category: bird 
Words: crane, heron, steam roller, hummingbird, pelican
answer:

steam roller