Complex sentence: Herbert I of Vermandois (c.848/850--907), Count of Vermandois, lord of Senlis, of Péronne and of Saint Quentin, was the son of Pepin of Vermandois.
Split into simpler sentences: Herbert I of Vermandois (c.848/850--907), Count of Vermandois, lord of Senlis, of Péronne and of Saint Quentin. Herbert was the son of Pepin of Vermandois.