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

Question: What was the 1st leg for Team 2, Leeds United?
SQL: SELECT "1st_leg" FROM "fourth_round" WHERE "team_2"='leeds united';

Question: What was the 1st leg for Team 2, Slovan Liberec?
SQL: SELECT "1st_leg" FROM "fourth_round" WHERE "team_2"='slovan liberec';

Question: Which Team 1, has Team 2, Slovan Liberec?
SQL: SELECT "team_1" FROM "fourth_round" WHERE "team_2"='slovan liberec';