Complex sentence: The Ottoman Empire administrative region that included the modern West Bank was referred to by the Ottomans as the Beirut Vilayet, and the specific district that included the modern West Bank was known as the Sanjak of Nablus.
Split into simpler sentences: The Ottoman Empire administrative region that included the modern West Bank was referred to by the Ottomans as the Beirut Vilayet. The specific district that included the modern West Bank was known as the Sanjak of Nablus.