CREATE TABLE table_15141 ("Name" TEXT, "Father" TEXT, "Birth" TEXT, "Marriage" TEXT, "Became Countess" TEXT, "Ceased to be Countess" TEXT, "Death" TEXT, "Spouse" TEXT)

Who was Margaret of Brabant's spouse?
SELECT "Spouse" FROM table_15141 WHERE "Name" = 'margaret of brabant'
SELECT "Spouse" FROM "table_15141" WHERE "Name" = 'margaret of brabant'