What is the lowest rank for Chris Brown with react greater than 0.244?
CREATE TABLE "semifinal_1" (
  "rank" real,
  "lane" real,
  "athlete" text,
  "nationality" text,
  "time" real,
  "react" real
);
SELECT MIN("rank") FROM "semifinal_1" WHERE "athlete"='chris brown' AND "react">0.244;