Complex sentence: Riro Kāinga was the son of Ngure a Pariko, who was a follower of Torometi, a strongman under French adventurer, Jean-Baptiste Dutrou-Bornier.
Split into simpler sentences: Riro Kāinga was the son of Ngure, the son of Pariko. His father was a follower of Torometi, a native strongman and supporter of French adventurer, Jean-Baptiste Dutrou-Bornier.