Complex sentence: In the 17th and the 18th centuries, pirates raided the bays of the island and continued until the 19th century when whaling was common from the ships of Europe and North America.
Split into simpler sentences: In the 17th and the 18th centuries, pirates raided the bays of the island. Piracy continued until the 19th century, when whaling was common from the ships of Europe and North America.