user: Question: When the Home team score was 15.18 (108), what's the lowest Crowd turnout?
Columns: ['Home team', 'Home team score', 'Away team', 'Away team score', 'Venue', 'Crowd', 'Date']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['Melbourne', '15.13 (103)', 'South Melbourne', '7.12 (54)', 'MCG', 13500.0, '21 August 1948']
SQL:

assistant: SELECT MIN("Crowd") FROM "Table" WHERE "Home team score" = '15.18 (108)';