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]: egret, crane, goose, dump truck, duck
[A]: dump truck


[Q]: hot, classy, pretty, fine, probation
[A]: probation


[Q]: excavator, heron, crane, windlass, dump truck
[A]:
heron