CREATE TABLE table_34521 ("Team 1" CLOB, "Agg." CLOB, "Team 2" CLOB, "1st leg" CLOB, "2nd leg" CLOB)

What was the 1st leg of the match that had an aggregate of 4-3?
SELECT "1st leg" FROM table_34521 WHERE "Agg." = '4-3'
SELECT "1st leg" FROM "table_34521" WHERE "Agg." = '4-3'