user: Question: Who was Footscray's opponent on June 15th of 1968?
Columns: ['Home team', 'Home team score', 'Away team', 'Away team score', 'Venue', 'Crowd', 'Date']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['Melbourne', '9.9 (63)', 'Richmond', '17.17 (119)', 'MCG', 39609.0, '15 June 1968']
SQL:

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