CREATE TABLE table_1531 ("Club" TEXT, "Played" TEXT, "Won" TEXT, "Drawn" TEXT, "Lost" TEXT, "Points for" TEXT, "Points against" TEXT, "Points difference" TEXT, "Points" TEXT)

How many losses does the club with 539 points for have?
SELECT "Lost" FROM table_1531 WHERE "Points for" = '539'
SELECT "Lost" FROM "table_1531" WHERE "Points for" = '539'