user: Question: What is the 1st leg with a 4-3 agg.?
Columns: ['Position', 'Team #1', 'Agg.', 'Team #2', '1st leg', '2nd leg']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['3rd place', 'MTK', '2-6', 'Bp. Honvéd', '1-3', '1-3']
SQL:

assistant: SELECT "1st leg" FROM "Table" WHERE "Agg." = '4-3';