What is the Set 1 with a Set 2 of 15–5, and a Set 3 with 15–3?
CREATE TABLE "pool_b" (
  "date" text,
  "score" text,
  "set_1" text,
  "set_2" text,
  "set_3" text,
  "total" text
);
SELECT "set_1" FROM "pool_b" WHERE "set_2"='15–5' AND "set_3"='15–3';