user: Question: What is the name of the away team that 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: ['Richmond', '16.14 (110)', 'South Melbourne', '12.12 (84)', 'MCG', 20817.0, '14 August 1976']
SQL:

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