Complex sentence: Thibaud de Nanteuil the Lord of Nanteuil, Lord of Pomponne and Lévignen, archdeacon of Beauvais and Church Dean of Reims, succeeded his uncle as bishop of Beauvais.
Split into simpler sentences: Thibaud de Nanteuil was the Lord of Nanteuil, Lord of Pomponne and Lévignen, archdeacon of Beauvais, and Church Dean of Reims. He succeeded his uncle as bishop of Beauvais.