Result of 1st, and an Extra of 4 x 400 m relay is in what lowest year?
CREATE TABLE "achievements" (
  "year" real,
  "tournament" text,
  "venue" text,
  "result" text,
  "extra" text
);
SELECT MIN("year") FROM "achievements" WHERE "result"='1st' AND "extra"='4 x 400 m relay';