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: physical activity 
Words: summer, roll, plummet, fall, exercise
answer:
summer


question:
Category: type of sandwich 
Words: meeting, bacon, submarine, toast, club
answer:
meeting


question:
Category: ocean 
Words: wave, early, sea, current, jetstream
answer:

early