Question: What was the 1st leg for Team 2, Leeds United?
SQL: SELECT "1st leg" FROM "2-18210406-5" WHERE "Team 2" = 'Leeds United';

Question: What was the 1st leg for Team 2, Slovan Liberec?
SQL: SELECT "1st leg" FROM "2-18210406-5" WHERE "Team 2" = 'Slovan Liberec';

Question: Which Team 1, has Team 2, Slovan Liberec?
SQL: SELECT "Team 1" FROM "2-18210406-5" WHERE "Team 2" = 'Slovan Liberec';