What was the 2nd leg score in the matchup with a team 2 of KK Borac?
CREATE TABLE "second_qualifying_round" (
  "team_num1" text,
  "agg" text,
  "team_num2" text,
  "1st_leg" text,
  "2nd_leg" text
);
SELECT "2nd_leg" FROM "second_qualifying_round" WHERE "team_num2"='kk borac';