Complex sentence: Some young Greeks enslaved during the massacre were adopted by wealthy Ottomans and converted to Islam, some even managing to rise to levels of prominence in the Ottoman Empire such as Georgios Stravelakis (later renamed Mustapha Khaznadar) and İbrahim Edhem Pasha.
Split into simpler sentences: Some young Greeks enslaved during the massacre were adopted by wealthy Ottomans and converted to Islam. Some even managed to rise to levels of prominence in the Ottoman Empire, such as Georgios Stravelakis (later renamed Mustapha Khaznadar) and İbrahim Edhem Pasha.