Complex sentence: The Oido shell mound is the only ruins of the flow of relations between North and South of Neolithic cultures of the Korean Peninsula and it also can be figured out coastal adaptation processes of foreshore zone in the neolithic era.
Split into simpler sentences: The Oido shell mound is an only ruins of the flow of relations between North and South of Neolithic cultures of the Korean Peninsula. And it also can be figured out coastal adaptation processes of foreshore zone in the neolithic era.