user: Question: What round was circuit AVUS?
Columns: ['Round', 'Circuit', 'Date', 'Pole Position', 'Fastest Lap', 'Winning Driver', 'Winning Team']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'AVUS', '1 May', 'Emanuele Pirro', 'Emanuele Pirro', 'Frank Biela', 'Racing Organisation Course']
SQL:

assistant: SELECT "Round" FROM "Table" WHERE "Circuit" = 'AVUS';