CREATE TABLE table_name_46 (constructor VARCHAR, winning_driver VARCHAR, race VARCHAR)

What was the constructor when Jack Brabham was the driver at the Monaco Grand Prix?
SELECT constructor FROM table_name_46 WHERE winning_driver = "jack brabham" AND race = "monaco grand prix"
SELECT "constructor" FROM "table_name_46" WHERE "jack brabham" = "winning_driver" AND "monaco grand prix" = "race"