CREATE TABLE table_21780 ("Club" TEXT, "Played" TEXT, "Won" TEXT, "Drawn" TEXT, "Lost" TEXT, "Points for" TEXT, "Points against" TEXT, "Points difference" TEXT, "Bonus Points" TEXT, "Points" TEXT)

How many points against have a lose of 13?
SELECT "Points against" FROM table_21780 WHERE "Lost" = '13'
SELECT "Points against" FROM "table_21780" WHERE "Lost" = '13'