CREATE TABLE "european_cup_history" (
  "season" text,
  "competition" text,
  "round" text,
  "opponent" text,
  "home" text,
  "away" text
);

Question: Which round has an opponent of Freiburg?
SQL: SELECT "round" FROM "european_cup_history" WHERE "opponent"='freiburg';

Question: Who was the home when the opponent was slovan liberec?
SQL: SELECT "home" FROM "european_cup_history" WHERE "opponent"='slovan liberec';