CREATE TABLE table_48114 ("Province" TEXT, "Largest city" TEXT, "2nd Largest" TEXT, "3rd Largest" TEXT, "4th largest" TEXT)

What province has the largest city of Birjand?
SELECT "Province" FROM table_48114 WHERE "Largest city" = 'birjand'
SELECT "Province" FROM "table_48114" WHERE "Largest city" = 'birjand'