user: Question: What is the largest crowd when Essendon is the home team?
Columns: ['Home team', 'Home team score', 'Away team', 'Away team score', 'Ground', 'Crowd', 'Date']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['Richmond', '1.8.0.5 (62)', 'Melbourne', '2.12.0.15 (105)', 'Telstra Dome', 16990.0, 'Friday, 21st February, 7:40PM']
SQL:

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