Input (grade 13): Nine years later, in 1156, Prince Yuri Dolgorukiy of Rostov ordered the construction of a wooden wall, the Kremlin, which had to be rebuilt multiple times, to surround the emerging city.
Output (grade 11): Nine years later, in 1156, Prince Yuri Dolgoruki ordered the building of a wooden wall, which had to be redone many times, to go around the growing city.