user: Question: In the game where the home team scored 19.21 (135), who was the away team?
Columns: ['Home team', 'Home team score', 'Away team', 'Away team score', 'Venue', 'Crowd', 'Date']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['Geelong', '13.12 (90)', 'Melbourne', '8.9 (57)', 'Kardinya Park', 18780.0, '22 July 1967']
SQL:

assistant: SELECT "Away team" FROM "Table" WHERE "Home team score" = '19.21 (135)';