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.

Q: current, wave, whirlpool, sea, data sets

A: data sets
****
Q: answer, answer calls, space, file, schedule

A: space
****
Q: flatter, woods, calf, deer, fawn

A:
flatter
****