CREATE TABLE table_204_448 (id DECIMAL, "team" TEXT, "winners" DECIMAL, "runners-up" DECIMAL, "years won" TEXT, "years runner-up" TEXT)

what are the number of runners up did arsenal have ?
SELECT "runners-up" FROM table_204_448 WHERE "team" = 'arsenal'
SELECT "runners-up" FROM "table_204_448" WHERE "team" = 'arsenal'