Which stadiums have an average attendance of 13840?
CREATE TABLE table_11208143_9 (
    stadium VARCHAR,
    average VARCHAR
)
SELECT stadium FROM table_11208143_9 WHERE average = 13840
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: Which stadiums have an average attendance of 13840? ### Input: CREATE TABLE table_11208143_9 (
    stadium VARCHAR,
    average VARCHAR
) ### Response: SELECT stadium FROM table_11208143_9 WHERE average = 13840