Complex sentence: The Republic of Pontus ("Dimokratía tou Póntou") was a proposed Pontic Greek state on the southern coast of the Black Sea, whose territory would have encompassed much of historical Pontos and which is today contained within Turkey's Black Sea Region.
Split into simpler sentences: The Republic of Pontus ("Dimokratía tou Póntou") was a proposed Pontic Greek state on the southern coast of the Black Sea. Its territory would have encompassed much of historical Pontos and forms part of Turkey's Black Sea Region.