The problem: Answer a question about this article:
Along with four other scientists and various military personnel, von Neumann was included in the target selection committee responsible for choosing the Japanese cities of Hiroshima and Nagasaki as the first targets of the atomic bomb. Von Neumann oversaw computations related to the expected size of the bomb blasts, estimated death tolls, and the distance above the ground at which the bombs should be detonated for optimum shock wave propagation and thus maximum effect. The cultural capital Kyoto, which had been spared the bombing inflicted upon militarily significant cities, was von Neumann's first choice, a selection seconded by Manhattan Project leader General Leslie Groves. However, this target was dismissed by Secretary of War Henry L. Stimson.
Who dismissed von Neuamann's primary target city?
****
The answer: Secretary of War Henry L. Stimson.

The problem: Answer a question about this article:
Miami (/mami/; Spanish pronunciation: [maiami]) is a city located on the Atlantic coast in southeastern Florida and the seat of Miami-Dade County. The 44th-most populated city proper in the United States, with a population of 430,332, it is the principal, central, and most populous city of the Miami metropolitan area, and the second most populous metropolis in the Southeastern United States after Washington, D.C. According to the U.S. Census Bureau, Miami's metro area is the eighth-most populous and fourth-largest urban area in the United States, with a population of around 5.5 million.
Where does Miami fall among the most populous urban areas in the United States?
****
The answer: eighth

The problem: Answer a question about this article:
Located in Yangtze River Delta area and the center of East China, Nanjing is home to one of the world's largest inland ports. Nanjing is also one of the fifteen sub-provincial cities in the People's Republic of China's administrative structure, enjoying jurisdictional and economic autonomy only slightly less than that of a province. Nanjing has been ranked seventh in the evaluation of "Cities with Strongest Comprehensive Strength" issued by the National Statistics Bureau, and second in the evaluation of cities with most sustainable development potential in the Yangtze River Delta. It has also been awarded the title of 2008 Habitat Scroll of Honour of China, Special UN Habitat Scroll of Honour Award and National Civilized City. Nanjing boasts many high-quality universities and research institutes, with the number of universities listed in 100 National Key Universities ranking third, including Nanjing University. The ratio of college students to total population ranks No.1 among large cities nationwide. Nanjing is one of the three Chinese top research centres according to Nature Index.
What does Nanjing have that is considered one of the world's biggest?
****
The answer: inland ports

The problem: Answer a question about this article:
The 1850 census saw a dramatic shift in the way information about residents was collected. For the first time, free persons were listed individually instead of by head of household. There were two questionnaires: one for free inhabitants and one for slaves. The question on the free inhabitants schedule about color was a column that was to be left blank if a person was white, marked "B" if a person was black, and marked "M" if a person was mulatto. Slaves were listed by owner, and classified by gender and age, not individually, and the question about color was a column that was to be marked with a "B" if the slave was black and an "M" if mulatto.
In what year were free persons first listed individually in the US census?
****
The answer:
1850