What is the Set 3 with a Date of 04 oct, and a Set 2 with 15–5?
CREATE TABLE "pool_b" (
  "date" text,
  "score" text,
  "set_1" text,
  "set_2" text,
  "set_3" text,
  "total" text
);
SELECT "set_3" FROM "pool_b" WHERE "date"='04 oct' AND "set_2"='15–5';