user: Question: In which season was there a competition in the Champions League?
Columns: ['Season', 'Competition', 'Round', 'Club', 'Score']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['1993–94', 'UEFA Cup', '1', 'Borussia Dortmund', '0–0, 0–1']
SQL:

assistant: SELECT "Season" FROM "Table" WHERE "Competition" = 'Champions League';