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