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: swallow, heron, crane, flamingo, tackle

SOLUTION: tackle

PROBLEM: exquisite, dull, high quality, fine, acceptable

SOLUTION: acceptable

PROBLEM: hamburger, bar, blt, club, open-faced

SOLUTION:
bar