CREATE TABLE table_name_6 (date VARCHAR, winning_driver VARCHAR, name VARCHAR)

On what date did Aymo Maggi win the Rome Grand Prix ?
SELECT date FROM table_name_6 WHERE winning_driver = "aymo maggi" AND name = "rome grand prix"
SELECT "date" FROM "table_name_6" WHERE "aymo maggi" = "winning_driver" AND "name" = "rome grand prix"