user: Question: Who was the winner when the runner-up was Chemnitzer FC II?
Columns: ['Date', 'Stadium', 'Winners', 'Runners-up', 'Score', 'Attendance']
Types: ['text', 'text', 'text', 'text', 'text', 'real']
Sample row: ['June 1, 1991', 'Waldstadion - Limbach-Oberfrohna', 'SpVgg Zschopau', 'FC Wismut Aue II', '4–1', 150.0]
SQL:

assistant: SELECT "Winners" FROM "Table" WHERE "Runners-up" = 'Chemnitzer FC II';