CREATE TABLE table_72746 ("Former kingdom" TEXT, "Province" TEXT, "Hangul" TEXT, "Hanja" TEXT, "Capital" TEXT, "Modern equivalent" TEXT)

What is the hanja for the province of 'sangju'?
SELECT "Hanja" FROM table_72746 WHERE "Province" = 'Sangju'
SELECT "Hanja" FROM "table_72746" WHERE "Province" = 'Sangju'