user: Question: What is the average amount of spectators when Essendon played as the home team?
Columns: ['Home team', 'Home team score', 'Away team', 'Away team score', 'Venue', 'Crowd', 'Date']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['Fitzroy', '14.15 (99)', 'Richmond', '12.16 (88)', 'Brunswick Street Oval', 11000.0, '16 August 1941']
SQL:

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