Complex sentence: The Chapmans had only consulted with Henry Rankin, a senior Ngarrendjeri Elder, in November 1989 and this discussion was not specifically in regards to Hindmarsh Island.
Split into simpler sentences: The Chapmans had only consulted with Henry Rankin, a senior Ngarrendjeri Elders in November 1989. This discussion was not specifically in regards to Hindmarsh Island.