user: Question: Which average crowd has a Home team score of 11.15 (81)?
Columns: ['Home team', 'Home team score', 'Away team', 'Away team score', 'Venue', 'Crowd', 'Date']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['Geelong', '12.13 (85)', 'Hawthorn', '10.14 (74)', 'Kardinia Park', 13373.0, '21 July 1956']
SQL:

assistant: SELECT AVG("Crowd") FROM "Table" WHERE "Home team score" = '11.15 (81)';