CREATE TABLE table_1139835_9 (venue VARCHAR, premier VARCHAR, attendance VARCHAR)

What venue has an attendance of 30824 at Essendon in 1984?
SELECT venue FROM table_1139835_9 WHERE premier = "Essendon" AND attendance = 30824
SELECT "venue" FROM "table_1139835_9" WHERE "Essendon" = "premier" AND "attendance" = 30824