Complex sentence: He believed his wife to be an exemplary woman of faith, and under her influence, he converted to the Baptist denomination, after he had many years earlier been baptized a Catholic in Nacogdoches, Texas.
Split into simpler sentences: He believed his wife to be an exemplary woman of faith. Under her influence he converted to the Baptist denomination, after he had many years earlier been baptized a Catholic in Nacogdoches, Texas.