user: Question: Who was the away team when the home team scored 12.21 (93)?
Columns: ['Home team', 'Home team score', 'Away team', 'Away team score', 'Venue', 'Crowd', 'Date']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['North Melbourne', '15.11 (101)', 'Richmond', '14.14 (98)', 'Arden Street Oval', 15359.0, '23 July 1977']
SQL:

assistant: SELECT "Away team" FROM "Table" WHERE "Home team score" = '12.21 (93)';