Complex sentence: His mother, Walks As She Thinks was an Oglala Lakota and his father was a Brulé Lakota Chief Lone Man, two of the major seven Lakota divisions.
Split into simpler sentences: His mother, Walks As She Thinks, was an Oglala Lakota and his father, Lone Man, was a Brulé Lakota chief. These were two of the major seven Lakota divisions.