Who was the Away Captain when the Home Captain was Joe Darling at Melbourne Cricket Ground?
CREATE TABLE table_name_21 (
    away_captain VARCHAR,
    venue VARCHAR,
    home_captain VARCHAR
)
SELECT away_captain FROM table_name_21 WHERE venue = "melbourne cricket ground" AND home_captain = "joe darling"
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: Who was the Away Captain when the Home Captain was Joe Darling at Melbourne Cricket Ground? ### Input: CREATE TABLE table_name_21 (
    away_captain VARCHAR,
    venue VARCHAR,
    home_captain VARCHAR
) ### Response: SELECT away_captain FROM table_name_21 WHERE venue = "melbourne cricket ground" AND home_captain = "joe darling"