user: Question: What is the 1st leg when team number 1 is CSU Sibiu?
Columns: ['Team #1', 'Agg.', 'Team #2', '1st leg', '2nd leg']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['BK Prostějov', '134-148', 'KK Zagreb', '61-69', '73-79']
SQL:

assistant: SELECT "1st leg" FROM "Table" WHERE "Team #1" = 'CSU Sibiu';