user: Question: What is the team 1 with a 2-1 2nd leg?
Columns: ['Team 1', 'Agg.', 'Team 2', '1st leg', '2nd leg']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Atlético Nacional', '3-2', 'Racing', '2-0', '1-2']
SQL:

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