Complex sentence: The Port of Puerto Plata is the third most important port in the country, it has two Terminals, one of them is currently been repaired by the government for tourism cruise operations, and its known as "Muelle Viejo".
Split into simpler sentences: The Port of Puerto Plata is the third most important port in the country. It has two terminals; one of them is currently been repaired by the government for tourism cruise operations, and its known as "Muelle Viejo".