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: direction 
Words: remorseful, south, descending, downward, down
answer:
remorseful


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


question:
Category: elements 
Words: heat, fire, blaze, ban, ground
answer:

ban