Complex sentence: The three ports comprising the'ort of Valencia, Valencia, Sagunto and Gandía, are located on the shores of the Mediterranean Sea, along an 80 km stretch of Spain's eastern coastline.
Split into simpler sentences: The three ports controlled by the Port Authority of Valencia are in Valencia, Valencia, Sagunto and Gandía. They are located on the shores of the Mediterranean Sea, along an 80 km stretch of Spain's eastern coastline.