user: Question: What is the 2nd leg for Barcelona Team 2?
Columns: ['Team 1', 'Agg.', 'Team 2', '1st leg', '2nd leg']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Real Unión', '( a ) 6–6', 'Real Madrid', '3–2', '3–4']
SQL:

assistant: SELECT "2nd leg" FROM "Table" WHERE "Team 2" = 'Barcelona';