Complex sentence: The classical Latin alphabet or Roman alphabet is a writing system which evolved from a western variety of the Greek alphabet called the Cumaean alphabet, itself a descendant of the Phoenician alphabet, itself a descendant of the Egyptian hieroglyphs.
Split into simpler sentences: The classical Latin alphabet or Roman alphabet is a writing system which evolved from a western variety of the Greek alphabet called the Cumaean alphabet. The Cumaean script was descended from the Phoenician alphabet, itself a descendant of Egyptian hieroglyphs.