CREATE TABLE "results_pool_a" (
  "date" text,
  "score" text,
  "set_1" text,
  "set_2" text,
  "set_3" text,
  "set_4" text,
  "set_5" text,
  "total" text
);

Question: What is the set 2 the has 1 set of 21-25, and 4 sets of 25-20?
SQL: SELECT "set_2" FROM "results_pool_a" WHERE "set_1"='21-25' AND "set_4"='25-20';