user: Question: What is the average crowd size at all matches where the home team scored 6.12 (48)?
Columns: ['Home team', 'Home team score', 'Away team', 'Away team score', 'Venue', 'Crowd', 'Date']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['Footscray', '9.17 (71)', 'Richmond', '6.9 (45)', 'Western Oval', 20000.0, '21 July 1951']
SQL:

assistant: SELECT AVG("Crowd") FROM "Table" WHERE "Home team score" = '6.12 (48)';