TASK DEFINITION: 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.
PROBLEM: egret, crane, goose, dump truck, duck

SOLUTION: dump truck

PROBLEM: ecstatic, content, disappointed, sad, service

SOLUTION: service

PROBLEM: fair, light, cold, tone, ghostly

SOLUTION:
cold