What was the score in the 1st leg when 2nd leg was 1–4?
CREATE TABLE "second_qualifying_round" (
  "team_1" text,
  "agg" text,
  "team_2" text,
  "1st_leg" text,
  "2nd_leg" text
);
SELECT "1st_leg" FROM "second_qualifying_round" WHERE "2nd_leg"='1–4';