user: Question: What is the average crowd where the home team scored 8.15 (63)?
Columns: ['Home team', 'Home team score', 'Away team', 'Away team score', 'Venue', 'Crowd', 'Date']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['Richmond', '11.18 (84)', 'St Kilda', '7.11 (53)', 'Punt Road Oval', 16000.0, '1 July 1944']
SQL:

assistant: SELECT AVG("Crowd") FROM "Table" WHERE "Home team score" = '8.15 (63)';