CREATE TABLE "second_round" (
  "team_1" text,
  "agg" text,
  "team_2" text,
  "1st_leg" text,
  "2nd_leg" text
);

Question: What is the 2nd leg that Team 1 is Union Berlin?
SQL: SELECT "2nd_leg" FROM "second_round" WHERE "team_1"='union berlin';