user: Question: Which home team score has an Away team score of 15.9 (99)?
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', '7.12 (54)', 'South Melbourne', '10.19 (79)', 'Junction Oval', 8000.0, '5 August 1944']
SQL:

assistant: SELECT "Home team score" FROM "Table" WHERE "Away team score" = '15.9 (99)';