user: Question: Name the total number of grounds for Essendon
Columns: ['Home team', 'Home team score', 'Away team', 'Away team score', 'Ground', 'Crowd', 'Date', 'Time']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text', 'text']
Sample row: ['Fremantle', '13.8 (86)', 'St. Kilda', '19.7 (121)', 'East Fremantle Oval', 10028.0, 'Friday 24 February 1995', '4:00 PM']
SQL:

assistant: SELECT COUNT("Ground") FROM "Table" WHERE "Home team" = 'Essendon';