What is the Set 1 with a Score of 3–0, and has a Set 3 of 15–10?
CREATE TABLE "pool_a" (
  "date" text,
  "score" text,
  "set_1" text,
  "set_2" text,
  "set_3" text,
  "total" text
);
SELECT "set_1" FROM "pool_a" WHERE "score"='3–0' AND "set_3"='15–10';