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: mode of transportation 
Words: spider, fly, train, jog, car
answer:
spider


question:
Category: physical property 
Words: brittleness, protein, bulky, skinny, fat
answer:
protein


question:
Category: shady activities 
Words: cookies, smear, fudge, unlicensed, fib
answer:

cookies