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]: swallow, heron, crane, flamingo, tackle
[A]: tackle


[Q]: cake, fudge, rich, invent, cream
[A]:
invent