Complex sentence: Part of his high school education was completed in the very elite "Colegio Helvetia" in Bogotá, and spend his last two years of schooling in Cartagena, in the "Naval School of Cartagena" from were he graduated.
Split into simpler sentences: Part of his high school education was completed in the "Colegio Helvetia" in Bogotá. He spent his last two years of schooling in Cartagena, in the "Naval School of Cartagena" from were he graduated.