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.
--------
Question: goat, iguana, raft, hamster, fish

Answer: raft


Question: current, history, wave, jetstream, whirlpool

Answer: history


Question: protein, chunky, big boned, fat, capacitance

Answer:
protein