Complex sentence: The Hamdanids were an Arab dynasty, established in 945 by Ali ibn Abdallah nicknamed Sayf al-Dawla, they ruled most of Syria with Aleppo as their capital, under the titular authority of the Abbasid Caliph.
Split into simpler sentences: The Hamdanids were an Arab dynasty, established in 945 by Ali ibn Abdallah nicknamed Sayf al-Dawla. They ruled most of Syria with Aleppo as their capital, under the titular authority of the Abbasid Caliph.