CREATE TABLE table_72966 ("Round" FLOAT, "Circuit" CLOB, "Date" CLOB, "Pole Position" CLOB, "Fastest Lap" CLOB, "Winning Driver" CLOB, "Winning Team" CLOB)

What round was circuit Avus?
SELECT MAX("Round") FROM table_72966 WHERE "Circuit" = 'AVUS'
SELECT MAX("Round") FROM "table_72966" WHERE "Circuit" = 'AVUS'