Who was the swimmer from Dominica who had a time of 21.2 and swam in lane 7?
CREATE TABLE "heat_3" (
  "rank" real,
  "lane" real,
  "athlete" text,
  "nationality" text,
  "time" real,
  "react" real
);
SELECT "athlete" FROM "heat_3" WHERE "time"<21.2 AND "lane"<7 AND "nationality"='dominica';