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: level, tone, fair, impartial, milky

A: impartial
****
Q: data sets, water, timely, current, late

A: water
****
Q: fly, flutter, bus, drive, fish

A:
fish
****