user: Question: What is the 2nd leg that Team 1 is Union Berlin?
Columns: ['Team 1', 'Agg.', 'Team 2', '1st leg', '2nd leg']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Roda JC', '5–3', 'Maccabi Tel Aviv', '4–1', '1–2']
SQL:

assistant: SELECT "2nd leg" FROM "Table" WHERE "Team 1" = 'Union Berlin';