user: Question: What is the average crowd size for the home team Essendon?
Columns: ['Home team', 'Home team score', 'Away team', 'Away team score', 'Venue', 'Crowd', 'Date']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['Melbourne', '10.10 (70)', 'South Melbourne', '9.13 (67)', 'Punt Road Oval', 10000.0, '8 July 1944']
SQL:

assistant: SELECT AVG("Crowd") FROM "Table" WHERE "Home team" = 'Essendon';