CREATE TABLE table_name_91 (winning_driver VARCHAR, winning_constructor VARCHAR, date VARCHAR)

Name the Winning driver of mercedes on 22 august?
SELECT winning_driver FROM table_name_91 WHERE winning_constructor = "mercedes" AND date = "22 august"
SELECT "winning_driver" FROM "table_name_91" WHERE "22 august" = "date" AND "mercedes" = "winning_constructor"