What was the first set with a third set of 25–21?
CREATE TABLE "pool_j" (
  "date" text,
  "time" text,
  "score" text,
  "set_1" text,
  "set_2" text,
  "set_3" text,
  "total" text,
  "report" text
);
SELECT "set_1" FROM "pool_j" WHERE "set_3"='25–21';