Complex sentence: Her older half-sister Pulcheria predeceased her parents as mentioned in the writings of Gregory of Nyssa, placing the death of Pulcheria prior to the death of Aelia Flaccilla, first wife of Theodosius I, in 385.
Split into simpler sentences: Her older half-sister Pulcheria predeceased her parents as mentioned in the writings of Gregory of Nyssa. Placing the death of Pulcheria prior to the death of Aelia Flaccilla, first wife of Theodosius I, in 385.