Input (grade 13): When the latter was sold to the Visconti of Milan in 1398, the island was acquired by the Appiani, Lords of Piombino, who retained it for two centuries.
Output (grade 8): In 1398, was sold to the Visconti family of Milan. After a few years, the island was acquired by the Appiani, Lords of Piombino, who kept it for two centuries.