Complex sentence: He had travelled down the Kaihū valley and northern Wairoa River to settle at Poutō, on the northern side of the Kaipara Harbour entrance, but was killed during a dispute over kūmara (sweet potato) gardens.
Split into simpler sentences: He had travelled down the Kaihū valley and northern Wairoa River and settled at Poutō, on the northern side of the Kaipara Harbour entrance. He was killed during a dispute over kūmara (sweet potato) gardens.