Complex sentence: The following day, the Taliban confirmed the death of Omar; sources close to the Taliban leadership said his deputy, Mullah Akhtar Mansour, would replace him, although with the lesser title of Supreme Leader.
Split into simpler sentences: The following day, the Taliban confirmed the death of Omar. Sources close to the Taliban leadership said his deputy, Mullah Akhtar Mansour, would replace him, although with the lesser title of Supreme Leader.