What is the sum of the Game with a Set 4 of 25-21 and a Set 3 of 25-23?
CREATE TABLE "pool_b" (
  "game" real,
  "date" text,
  "set_1" text,
  "set_2" text,
  "set_3" text,
  "set_4" text,
  "set_5" text,
  "result_sets" text,
  "result_pts" text
);
SELECT SUM("game") FROM "pool_b" WHERE "set_4"='25-21' AND "set_3"='25-23';