Table:
text: 1957 Formula One season
Non-Championship race results
Non-Championship race results
Race_Name Circuit Date_ Winning_driver Constructor_ Report
XI Gran Premio Ciudad de Buenos Aires Buenos Aires 27 January Juan Manuel Fangio Maserati Report
VII Gran Premio di Siracusa Syracuse 7 April Peter Collins Lancia - Ferrari Report
XVII Pau Grand Prix Pau 22 April Jean Behra Maserati Report
V Glover Trophy Goodwood 22 April Stuart Lewis-Evans Connaught - Alta Report
X Gran Premio di Napoli Posillipo 28 April Peter Collins Lancia - Ferrari Report
XXIII Grand Prix de Reims Reims-Gueux 14 July Luigi Musso Lancia - Ferrari Report
V Grand Prix de Caen Caen 28 July Jean Behra BRM Report

Question: What date was the Syracuse Circuit for the 1957 Formula One season for non-championship racing results?

Question: What x date of the Gran Premio di Napoli were the results of the non-championship races of the 1957 Formula 1 season?