Complex sentence: Ranks of the Alii First were the Ali Pio who were product of full blood sibling unions famous, Pio chiefs were the royal twins, Kameeiamoku and Kamanawa.
Split into simpler sentences: Ranks of the Alii First were the Ali Pio who were product of full blood sibling unions. Famous Pio chiefs were the royal twins, Kameeiamoku and Kamanawa.