What's the smallest react of Zimbabwe, ranked after 1 in a lane after 3 and a time less than 20.3?
CREATE TABLE "heat_2" (
  "rank" real,
  "lane" real,
  "athlete" text,
  "nationality" text,
  "time" real,
  "react" real
);
SELECT MIN("react") FROM "heat_2" WHERE "lane">3 AND "time"<20.3 AND "nationality"='zimbabwe' AND "rank">1;