[['rank', 'nation', 'gold', 'silver', 'bronze', 'total'], ['1', 'east germany (gdr)', '12', '10', '8', '30'], ['2', 'soviet union (urs)', '8', '9', '5', '22'], ['3', 'sweden (swe)', '2', '2', '1', '5'], ['4', 'australia (aus)', '2', '0', '5', '7'], ['5', 'great britain (gbr)', '1', '3', '1', '5'], ['6', 'hungary (hun)', '1', '2', '1', '4'], ['7', 'brazil (bra)', '0', '0', '1', '1'], ['7', 'denmark (den)', '0', '0', '1', '1'], ['7', 'netherlands (ned)', '0', '0', '1', '1'], ['7', 'poland (pol)', '0', '0', '1', '1'], ['7', 'spain (esp)', '0', '0', '1', '1']]
during The 1980 Summer Olympics , there were 5 country that only won a single medal for Swimming : Spain , Poland , Netherlands , Denmark , and Brazil
during [ENT] , there were [ENT] country that only won a single medal for [ENT] : [ENT] , [ENT] , [ENT] , [ENT] , and [ENT]