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.
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Question: hull, galley, deck, lifeline, tko

Answer: tko


Question: emotional upsets, pick, emotional state, fret, emotional supports

Answer: pick


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

Answer:
data sets