user: Question: What was the home team's score when the away team scored 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: ['Hawthorn', '14.20 (104)', 'Richmond', '18.11 (119)', 'Princes Park', 13557.0, '21 July 1979']
SQL:

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