CREATE TABLE table_15430 ("Team 1" TEXT, "Agg." TEXT, "Team 2" TEXT, "1st leg" TEXT, "2nd leg" TEXT)

What is the agg for a team second leg of 1-3?
SELECT "Agg." FROM table_15430 WHERE "2nd leg" = '1-3'
SELECT "Agg." FROM "table_15430" WHERE "2nd leg" = '1-3'