What is the team #1 that has unics kazan for team #2?
CREATE TABLE "eighthfinals" (
  "team_num1" text,
  "agg" text,
  "team_num2" text,
  "1st_leg" text,
  "2nd_leg" text
);
SELECT "team_num1" FROM "eighthfinals" WHERE "team_num2"='unics kazan';