Complex sentence: However, in 1963, two years after Rockefeller's divorce from his first wife, he married Margarita "Happy" Murphy, who was 15 years younger than he and had just divorced her husband and surrendered her four children to his custody.
Split into simpler sentences: However, in 1963, two years after Rockefeller's divorce from his first wife, he married Margarita "Happy" Murphy. Happy Rockefeller was a woman 15 years younger than Nelson, who had just divorced her husband and surrendered her four children to his custody.