What is the set 1 with a 28-30 set 4?
CREATE TABLE "results_pool_d" (
  "date" text,
  "score" text,
  "set_1" text,
  "set_2" text,
  "set_3" text,
  "set_4" text,
  "set_5" text,
  "total" text
);
SELECT "set_1" FROM "results_pool_d" WHERE "set_4"='28-30';