Input (grade 12): (Louis's son and heir, the future Emperor Napoleon III, on the other hand, was at that time being imprisoned in France for having tried to engineer a Bonapartist coup d' Ã tat.)
Output (grade 11): His son and heir, Charles Louis-Napoleon Bonaparte, on the other hand, was at that time imprisoned in France for having tried to engineer a Bonapartist coup d' Ã tat.