user: Question: When the home team was Richmond, what was the largest crowd?
Columns: ['Home team', 'Home team score', 'Away team', 'Away team score', 'Venue', 'Crowd', 'Date']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['St Kilda', '19.14 (128)', 'South Melbourne', '16.12 (108)', 'Moorabbin Oval', 12969.0, '28 July 1979']
SQL:

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