Complex sentence: The Ifat Sultanate was a Muslim sultanate led by the Walashma dynasty based in Zeila, which ruled over parts of what is now eastern Ethiopia, Djibouti and northern Somalia.
Split into simpler sentences: The Ifat Sultanate was a Muslim sultanate led by the Walashma dynasty. Based in Zeila, it ruled over parts of what is now eastern Ethiopia, Djibouti and northern Somalia.