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: fly, grasshopper, walk, waggle, train

SOLUTION: train

PROBLEM: up to the moment, tide, current, jetstream, brine

SOLUTION: up to the moment

PROBLEM: content, sad, books, item, activity

SOLUTION:
sad