What is the size of the crowd for the game where the away team South Melbourne played?
CREATE TABLE table_name_39 (
    crowd INTEGER,
    away_team VARCHAR
)
SELECT AVG(crowd) FROM table_name_39 WHERE away_team = "south melbourne"
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 is the size of the crowd for the game where the away team South Melbourne played? ### Input: CREATE TABLE table_name_39 (
    crowd INTEGER,
    away_team VARCHAR
) ### Response: SELECT AVG(crowd) FROM table_name_39 WHERE away_team = "south melbourne"