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.

[EX Q]: fire, cool, water, ban, ice
[EX A]: ban

[EX Q]: balanced, well, milky, size, fair
[EX A]: balanced

[EX Q]: spider, train, fly, dive, fish
[EX A]:
train