What was the average size of the crowd for matches held at Corio Oval?
CREATE TABLE table_name_28 (crowd INTEGER, venue VARCHAR)
SELECT AVG(crowd) FROM table_name_28 WHERE venue = "corio oval"
### Context: CREATE TABLE table_name_28 (crowd INTEGER, venue VARCHAR) ### Question: What was the average size of the crowd for matches held at Corio Oval? ### Answer: SELECT AVG(crowd) FROM table_name_28 WHERE venue = "corio oval"