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: social gathering 
Words: place, club, outing, lettuce, group
answer:
lettuce


question:
Category: police punishment 
Words: probation, jail, arrest, fine, beautiful
answer:
beautiful


question:
Category: mode of transportation 
Words: train, glide, jog, cockroach, fly
answer:

cockroach