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: sustainability, firm, amalgamated, combined, rigged

SOLUTION: rigged

PROBLEM: trustworthy, milky, fair, equitable, decent

SOLUTION: milky

PROBLEM: expression, cute, fawn, identity, kitten

SOLUTION:
kitten