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