CREATE TABLE table_20550 ("Season" CLOB, "1st Place" CLOB, "2nd Place" CLOB, "3rd Place" CLOB, "4th Place" CLOB)

What teams finished in 3rd when panathinaikos finished 2nd?
SELECT "3rd Place" FROM table_20550 WHERE "2nd Place" = 'Panathinaikos'
SELECT "3rd Place" FROM "table_20550" WHERE "2nd Place" = 'Panathinaikos'