Who won group III when group 1 was of the racing club?
CREATE TABLE "champions" (
  "season" text,
  "group_i" text,
  "group_ii" text,
  "group_iii" text,
  "group_iv" text,
  "group_v" text,
  "group_vi" text
);
SELECT "group_iii" FROM "champions" WHERE "group_i"='racing club';