user: Question: What is the average crowd size for the home team Hawthorn?
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', '9.13 (67)', 'South Melbourne', '13.15 (93)', 'Moorabbin Oval', 17833.0, '10 August 1974']
SQL:

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