user: Question: What is the sum of Crowd when Essendon was 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', '11.13 (79)', 'Footscray', '12.11 (83)', 'Brunswick Street Oval', 9000.0, '6 June 1942']
SQL:

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