Given a set of five words, generate the word from the set that does not belong (i.e. is the least relevant) with the other words. Words are separated by commas.

Q: confident, popular, classy, cool, chill

A: chill
****
Q: weenie, provision, frank, cheese, precise

A: precise
****
Q: flow, main, signal, data sets, current

A:
data sets
****