user: Question: When the away team was Carlton, who was the home team?
Columns: ['Home team', 'Home team score', 'Away team', 'Away team score', 'Ground', 'Crowd', 'Date']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['Essendon', '2.13.11 (107)', 'Fremantle', '1.13.12 (99)', 'Marrara Oval', 13196.0, 'Friday, 20 February, 7:10 PM']
SQL:

assistant: SELECT "Home team" FROM "Table" WHERE "Away team" = 'Carlton';