user: Question: What is 1st Leg, when 2nd Leg is 1-3?
Columns: ['Team 1', 'Agg.', 'Team 2', '1st leg', '2nd leg']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Botswana Defence Force XI', '1-2', 'Mbabane Highlanders', '1-1', '0-1']
SQL:

assistant: SELECT "1st leg" FROM "Table" WHERE "2nd leg" = '1-3';