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]: heron, davit, egret, derrick, crane
[A]: davit


[Q]: current, history, wave, jetstream, whirlpool
[A]: history


[Q]: ground, fire, scold, blaze, earth
[A]:
scold