What was the constructor when Jack Brabham was the driver at the Monaco Grand Prix?
CREATE TABLE table_53103 (
    "Race" text,
    "Circuit" text,
    "Date" text,
    "Pole position" text,
    "Fastest lap" text,
    "Winning driver" text,
    "Constructor" text,
    "Tyre" text,
    "Report" text
)
SELECT "Constructor" FROM table_53103 WHERE "Winning driver" = 'jack brabham' AND "Race" = 'monaco grand prix'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: What was the constructor when Jack Brabham was the driver at the Monaco Grand Prix? ### Input: CREATE TABLE table_53103 (
    "Race" text,
    "Circuit" text,
    "Date" text,
    "Pole position" text,
    "Fastest lap" text,
    "Winning driver" text,
    "Constructor" text,
    "Tyre" text,
    "Report" text
) ### Response: SELECT "Constructor" FROM table_53103 WHERE "Winning driver" = 'jack brabham' AND "Race" = 'monaco grand prix'