Original sentence: In Serbian realm:.Under the Bosnian Kingdom, later sovereign Herzegovina (Duchy of Saint Sava):
Edited sentence: Under the Bosnian-Serbian Kingdom, later sovereign Herzegovina (Duchy of Saint Sava):.Unified Serbian realm:.Zachlumia (Croatian: Zahumlje; Serbian: Захумље), also known as the Land of the Hum and Chelm, was a medieval principality located in today's Herzegovina (modern day Bosnia and Herzegovina), and southern Dalmatia (modern day Republic of Croatia)