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]: tone, just, equitable, fair, unprejudiced
[A]: tone

[Q]: brash, frank, bun, hot dog, grub
[A]: brash

[Q]: ghostly, windy, 70, brisk, fair
[A]:
ghostly