CREATE TABLE table_71487 ("Team 1" TEXT, "Agg." TEXT, "Team 2" TEXT, "1st leg" TEXT, "2nd leg" TEXT)

For an aggregate of 1-3, what was the 2nd leg?
SELECT "2nd leg" FROM table_71487 WHERE "Agg." = '1-3'
SELECT "2nd leg" FROM "table_71487" WHERE "Agg." = '1-3'