user: Question: What is the 2nd leg when San Pedro was the winner?
Columns: ['Year', 'Winner', 'Runners-up', 'Aggregate', '1st leg', '2nd leg']
Types: ['real', 'text', 'text', 'text', 'text', 'text']
Sample row: [1956.0, 'Trinidad', 'Liga Central', '4-2', '2-1', '2-1']
SQL:

assistant: SELECT "2nd leg" FROM "Table" WHERE "Winner" = 'San Pedro';