Complex sentence: Gjergj Arianiti, who was in the Ottoman court as a hostage was called by rebels to lead the revolt in his family's domains, fled from Edirne and returned to Albania.
Split into simpler sentences: Gjergj Arianiti, who was living at the Ottoman court as a hostage, was called by rebels to lead the revolt in his family's domains. In response, he fled from Edirne and returned to Albania.