CREATE TABLE table_name_91 (date VARCHAR2, winning_driver VARCHAR2, race_name VARCHAR2)

What is the date that the winner driver is Stirling Moss in the race named vi grand prix de caen?
SELECT date FROM table_name_91 WHERE winning_driver = "stirling moss" AND race_name = "vi grand prix de caen"
SELECT "date" FROM "table_name_91" WHERE "race_name" = "vi grand prix de caen" AND "stirling moss" = "winning_driver"