Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_21 (away_captain VARCHAR, venue VARCHAR, home_captain VARCHAR)
### Question:
Who was the Away Captain when the Home Captain was Joe Darling at Melbourne Cricket Ground?
### Answer:
SELECT away_captain FROM table_name_21 WHERE venue = "melbourne cricket ground" AND home_captain = "joe darling"