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: crane, goose, hoist, pelican, hummingbird

Answer: hoist


Question: flap, glide, fly, train, bats

Answer: bats


Question: fly, run, leap, bats, flap

Answer:
flap