What was the team 1 for the tie that had a first leg score of 2-3?
CREATE TABLE "second_round" (
  "team_1" text,
  "agg" text,
  "team_2" text,
  "1st_leg" text,
  "2nd_leg" text
);
SELECT "team_1" FROM "second_round" WHERE "1st_leg"='2-3';