Original sentence: Almost all the transport in and out of the city had been rendered inoperative, and bombed-out sewers had contaminated the city's water supplies.Despite Soviet efforts to supply food and rebuild the city, starvation remained a problem.However, according to historian, Norman Naimark, the food supply was superior in the Soviet occupation zone.In June 1945, one month after the surrender, when the Americans arrived in their sector of Berlin they noted that average calorie intake of Berliners was still low as they were getting only 64 percent of a 1,240-calorie daily ration
Edited sentence: Although the food supply was superior in the Soviet occupation zone, starvation remained a problem.In June 1945, one month after the surrender the average calorie intake of Berliners was low as they were getting only 64 percent of a 1,240-calorie daily ration