CREATE TABLE table_55592 ("Team 1" TEXT, "Agg." TEXT, "Team 2" TEXT, "1st leg" TEXT, "2nd leg" TEXT)

When Partizan is Team 2, what is the Agg?
SELECT "Agg." FROM table_55592 WHERE "Team 2" = 'partizan'
SELECT "Agg." FROM "table_55592" WHERE "Team 2" = 'partizan'