user: Question: What team 1 has a team 2 of Universidad Nacional?
Columns: ['Team 1', 'Agg.', 'Team 2', '1st leg', '2nd leg']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Jalapa', '1–5', 'San Francisco', '1–0', '0–5']
SQL:

assistant: SELECT "Team 1" FROM "Table" WHERE "Team 2" = 'Universidad Nacional';