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: signal, sea, current, drink, belated

A: belated
****
Q: jog, cow, hike, duck, crouch

A: cow
****
Q: raining, mild, tone, fair, 70

A:
tone
****