user: Question: Who was the opposing team in the 3rd round?
Columns: ['Round', 'Opposition', 'First leg', 'Second leg', 'Aggregate score']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['1st', 'Eintracht Frankfurt', '2–0 (h)', '0–0 (a)', '2–0']
SQL:

assistant: SELECT "Opposition" FROM "Table" WHERE "Round" = '3rd';