Complex sentence: A princess from the Croatian House of Šubić of Dalmatia was sent by her father, Grgur, to the court of their relative Tvrtko I (the ban of Bosnia) to be raised and married by Tvrtko's mother Jelena.
Split into simpler sentences: A princess from the Croatian House of Šubić of Dalmatia was sent by her father, Grgur, to the court of their relative Tvrtko I, the ban of Bosnia. She was supposed to be raised and married by Tvrtko's mother Jelena.