Problem: Please answer a question about the following article about Mexico City:
The south of the city is home to some other high-income neighborhoods such as Colonia del Valle and Jardines del Pedregal, and the formerly separate colonial towns of Coyoacan, San Angel, and San Jeronimo. Along Avenida Insurgentes from Paseo de la Reforma, near the center, south past the World Trade Center and UNAM university towards the Periferico ring road, is another important corridor of corporate office space. The far southern boroughs of Xochimilco and Tlahuac have a significant rural population with Milpa Alta being entirely rural.
How is Milpa Alta constructed?
A: entirely rural
Problem: Please answer a question about the following article about Republic of the Congo:
During the Nazi occupation of France during World War II, Brazzaville functioned as the symbolic capital of Free France between 1940 and 1943. The Brazzaville Conference of 1944 heralded a period of major reform in French colonial policy. Congo benefited from the postwar expansion of colonial administrative and infrastructure spending as a result of its central geographic location within AEF and the federal capital at Brazzaville. It also received a local legislature after the adoption of the 1946 constitution that established the Fourth Republic.
What meeting brought about changes in France's policy towards its colonies?
A: Brazzaville Conference of 1944
Problem: Please answer a question about the following article about Sumer:
It is speculated by some archaeologists that Sumerian speakers were farmers who moved down from the north, after perfecting irrigation agriculture there. The Ubaid pottery of southern Mesopotamia has been connected via Choga Mami transitional ware to the pottery of the Samarra period culture (c. 5700 4900 BC C-14) in the north, who were the first to practice a primitive form of irrigation agriculture along the middle Tigris River and its tributaries. The connection is most clearly seen at Tell Awayli (Oueilli, Oueili) near Larsa, excavated by the French in the 1980s, where eight levels yielded pre-Ubaid pottery resembling Samarran ware. According to this theory, farming peoples spread down into southern Mesopotamia because they had developed a temple-centered social organization for mobilizing labor and technology for water control, enabling them to survive and prosper in a difficult environment.[citation needed]
What had the Sumerians perfected before coming south?
A: irrigation agriculture
Problem: Please answer a question about the following article about Railway electrification system:
In the former Soviet Union, electric traction eventually became somewhat more energy-efficient than diesel. Partly due to inefficient generation of electricity in the USSR (only 20.8% thermal efficiency in 1950 vs. 36.2% in 1975), in 1950 diesel traction was about twice as energy efficient as electric traction (in terms of net tonne-km of freight per kg of fuel). But as efficiency of electricity generation (and thus of electric traction) improved, by about 1965 electric railways became more efficient than diesel. After the mid 1970s electrics used about 25% less fuel per ton-km. However diesels were mainly used on single track lines with a fair amount of traffic so that the lower fuel consumption of electrics may be in part due to better operating conditions on electrified lines (such as double tracking) rather than inherent energy efficiency. Nevertheless, the cost of diesel fuel was about 1.5 times more (per unit of heat energy content) than that of the fuel used in electric power plants (that generated electricity), thus making electric railways even more energy-cost effective.
What type of trains became more energy-efficient in the former Soviet Union?
A:
electric