What is the circuit for the ADAC großer preis der tourenwagen race?
CREATE TABLE "race_calendar_and_winners" (
  "round" real,
  "race" text,
  "circuit" text,
  "date" text,
  "event" text,
  "winning_driver" text,
  "winning_team" text
);
SELECT "circuit" FROM "race_calendar_and_winners" WHERE "race"='adac großer preis der tourenwagen';