Result of 1st, and a Venue of melbourne , australia, and a Extra of 100 m happened in which year?
CREATE TABLE "achievements" (
  "year" real,
  "tournament" text,
  "venue" text,
  "result" text,
  "extra" text
);
SELECT "year" FROM "achievements" WHERE "result"='1st' AND "venue"='melbourne , australia' AND "extra"='100 m';