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: aesthetic characteristic 
Words: level, fair, milky, sunny, well
answer:
sunny


question:
Category: ocean 
Words: current, data sets, main, sea, wave
answer:
data sets


question:
Category: physical activity 
Words: bend, spring, roll, fall, tumble
answer:

spring