CREATE TABLE table_42379 ("Team 1" TEXT, "Agg." TEXT, "Team 2" TEXT, "1st leg" TEXT, "2nd leg" TEXT)

What 1st leg has 52-70 as the agg.?
SELECT "1st leg" FROM table_42379 WHERE "Agg." = '52-70'
SELECT "1st leg" FROM "table_42379" WHERE "Agg." = '52-70'