Original sentence: Its historic monuments were systematically annihilated by the retreating Red Army.When the Red Army captured the city on January 19, 1944, out of 2,536 stone buildings, fewer than forty were still standing
Edited sentence: Its historic monuments were systematically annihilated.When the Red Army liberated the city on January 19, 1944, out of 2,536 stone buildings, fewer than forty were still standing