what is the 2nd leg when team #2 is žalgiris kaunas?
CREATE TABLE "top_16" (
  "team_num1" text,
  "agg" text,
  "team_num2" text,
  "1st_leg" text,
  "2nd_leg" text,
  "3rd_leg" text
);
SELECT "2nd_leg" FROM "top_16" WHERE "team_num2"='žalgiris kaunas';