CREATE TABLE "round_of_16" (
  "team_1" text,
  "agg" text,
  "team_2" text,
  "1st_leg" text,
  "2nd_leg" text
);

Question: Which team 1 has vfl gummersbach as team 2?
SQL: SELECT "team_1" FROM "round_of_16" WHERE "team_2"='vfl gummersbach';

Question: What is the 2nd leg that has 31-37 as the 1st leg?
SQL: SELECT "2nd_leg" FROM "round_of_16" WHERE "1st_leg"='31-37';

Question: Which team 1 has cbm valladolid as team 2?
SQL: SELECT "team_1" FROM "round_of_16" WHERE "team_2"='cbm valladolid';

Question: What 2nd leg has rk gold club kozina as team 1?
SQL: SELECT "2nd_leg" FROM "round_of_16" WHERE "team_1"='rk gold club kozina';

Question: What 1st leg has 52-70 as the agg.?
SQL: SELECT "1st_leg" FROM "round_of_16" WHERE "agg"='52-70';