Original sentence: Indeed, it was under the Bourbons that the arsenal became an enormous shipyard and the day of September 27 1818 saw the launch of the Real Ferdiando I, the first steamship of the Mediterranean Sea
Edited sentence: Indeed, it was under the Bourbons that the arsenal became an enormous shipyard and the day of September 27, 1818 saw the launch of the Real Ferdiando I, the first steamship of the Mediterranean Sea