whatthe minimum round where grand prix is german grand prix
CREATE TABLE "grands_prix" (
  "round" real,
  "grand_prix" text,
  "date" text,
  "location" text,
  "pole_position" text,
  "fastest_lap" text,
  "winning_driver" text,
  "winning_constructor" text,
  "report" text
);
SELECT MIN("round") FROM "grands_prix" WHERE "grand_prix"='German Grand Prix';