What teams finished in 3rd when panathinaikos finished 2nd?
CREATE TABLE "by_season" (
  "season" text,
  "1st_place" text,
  "2nd_place" text,
  "3rd_place" text,
  "4th_place" text
);
SELECT "3rd_place" FROM "by_season" WHERE "2nd_place"='Panathinaikos';