Input (grade 11): Early career Giotto's master, Cimabue, was one of the two most highly renowned painters of Tuscany, the other being Duccio, who worked mainly in Siena.
Output (grade 5): Giotto's master, Cimabue, was one of the two most famous painters of Tuscany. He worked in Florence, while the other famous painter, Duccio, worked mainly in Siena.