What's the average crowd size when the venue is western oval?
CREATE TABLE table_name_91 (
    crowd INTEGER,
    venue VARCHAR
)
SELECT AVG(crowd) FROM table_name_91 WHERE venue = "western oval"
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's the average crowd size when the venue is western oval? ### Input: CREATE TABLE table_name_91 (
    crowd INTEGER,
    venue VARCHAR
) ### Response: SELECT AVG(crowd) FROM table_name_91 WHERE venue = "western oval"