[['name', 'circuit', 'date', 'winning driver', 'winning constructor', 'report'], ['são paulo grand prix', 'interlagos', '5 january', 'chico landi', 'alfa romeo', 'report'], ['general juan perón grand prix', 'retiro', '9 february', 'luigi villoresi', 'maserati', 'report'], ['eva duarte perón grand prix', 'retiro', '16 february', 'luigi villoresi', 'maserati', 'report'], ['rosario grand prix', 'independence park', '2 march', 'achille varzi', 'alfa romeo', 'report'], ['rafaela grand prix', 'rafaela', '20 march', 'oscar alfredo gálvez', 'alfa romeo', 'report'], ['interlagos grand prix', 'interlagos', '30 march', 'achille varzi', 'alfa romeo', 'report'], ['pau grand prix', 'pau', '7 april', 'nello pagani', 'maserati', 'report'], ['rio de janeiro grand prix', 'gávea', '21 april', 'chico landi', 'alfa romeo', 'report'], ['roussillon grand prix', 'perpignan', '27 april', 'eugène chaboud', 'talbot - lago - talbot', 'report'], ['jersey road race', 'saint helier', '8 may', 'reg parnell', 'maserati', 'report'], ['marseille grand prix', 'prado', '18 may', 'eugène chaboud', 'talbot - lago - talbot', 'report'], ['grand prix des frontières', 'chimay', '25 may', 'yves giraud - cabantous', 'maserati', 'report'], ['nîmes grand prix', 'nîmes', '1 june', 'luigi villoresi', 'maserati', 'report'], ['challenges agaci', 'montlhéry', '8 june', 'maurice varet', 'delage', 'report'], ['marne grand prix', 'reims', '6 july', 'christian kautz', 'maserati', 'report'], ['gransden lodge', 'gransden lodge airfield', '12 july', 'dennis poore', 'alfa romeo', 'report'], ['albi grand prix', 'albi', '13 july', 'louis rosier', 'talbot - lago - talbot', 'report'], ['bari grand prix', 'lungomare', '13 july', 'achille varzi', 'alfa romeo', 'report'], ['bell ville grand prix', 'bell ville', '13 july', 'oscar alfredo gálvez', 'alfa romeo', 'report'], ['nice grand prix', 'nice', '20 july', 'luigi villoresi', 'maserati', 'report'], ['alsace grand prix', 'strasbourg', '3 august', 'luigi villoresi', 'maserati', 'report'], ['ulster trophy', 'ballyclare', '9 august', 'bob gerard', 'era', 'report'], ['comminges grand prix', 'saint - gaudens', '10 august', 'louis chiron', 'talbot - lago - talbot', 'report'], ['montevideo grand prix', 'playa ramirez', '17 august', 'oscar alfredo gálvez', 'alfa romeo', 'report'], ['british empire trophy', 'douglas', '21 august', 'bob gerard', 'era', 'report'], ['mar del plata grand prix', 'el torreon', '21 september', 'oscar alfredo gálvez', 'alfa romeo', 'report'], ['lausanne grand prix', 'lausanne', '5 october', 'luigi villoresi', 'maserati', 'report'], ['coupe du salon', 'montlhéry', '16 november', 'yves giraud - cabantous', 'talbot - lago - talbot', 'report']]
there were 3 winner on July 13 - Louis Rosier , Achille Varzi , and Oscar Alfredo Gálvez
there were 3 winner on [ENT] - [ENT] , [ENT] , and [ENT]