Input: Railway electrification system
In the Soviet Union, in the 1970s, a comparison was made between systems electrified at 3 kV DC and 25 kV AC (50 Hz). The results showed that percentage losses in the overhead wires (catenary and contact wires) was over 3 times greater for 3 kV DC than for 25 kV AC. But when the conversion losses were all taken into account and added to overhead wire losses (including cooling blower energy) the 25 kV AC lost a somewhat higher percent of energy than for 3 kV DC. Thus in spite of the much higher losses in the catenary, the 3 kV DC was a little more energy efficient than AC in providing energy from the USSR power grid to the terminals of the traction motors (all DC at that time). While both systems use energy in converting higher voltage AC from the USSR's power grid to lower voltage DC, the conversions for the DC system all took place (at higher efficiency) in the railway substation, while most of the conversion for the AC system took place inside the locomotive (at lower efficiency). Consider also that it takes energy to constantly move this mobile conversion hardware over the rails while the stationary hardware in the railway substation doesn't incur this energy cost. For more details see: Wiki: Soviet Union DC vs. AC.

What two systems were compare in the Soviet Union in 1970?
Output: 3 kV DC and 25 kV AC (50 Hz

Input: Article: While the new plebeian nobility made social, political and religious inroads on traditionally patrician preserves, their electorate maintained their distinctive political traditions and religious cults. During the Punic crisis, popular cult to Dionysus emerged from southern Italy; Dionysus was equated with Father Liber, the inventor of plebeian augury and personification of plebeian freedoms, and with Roman Bacchus. Official consternation at these enthusiastic, unofficial Bacchanalia cults was expressed as moral outrage at their supposed subversion, and was followed by ferocious suppression. Much later, a statue of Marsyas, the silen of Dionysus flayed by Apollo, became a focus of brief symbolic resistance to Augustus' censorship. Augustus himself claimed the patronage of Venus and Apollo; but his settlement appealed to all classes. Where loyalty was implicit, no divine hierarchy need be politically enforced; Liber's festival continued.

Now answer this question: During what time did the Dionysus cult become popular?

Output: Punic crisis

Article: In the 1980s and early 1990s, there was a significant movement in favor of the territory becoming a commonwealth, which would give it a level of self-government similar to Puerto Rico and the Northern Mariana Islands. However, the federal government rejected the version of a commonwealth that the government of Guam proposed, due to it having clauses incompatible with the Territorial Clause (Art. IV, Sec. 3, cl. 2) of the U.S. Constitution. Other movements advocate U.S. statehood for Guam, union with the state of Hawaii, union with the Northern Mariana Islands as a single territory, or independence.

Question: What major movement occurred in Guam in the 80's and 90's?
Ans: becoming a commonwealth

Here is a question about this article: West Raleigh lies along Hillsborough Street and Western Boulevard. The area is bordered to the west by suburban Cary. It is home to North Carolina State University, Meredith College, Pullen Park, Pullen Memorial Baptist Church, Cameron Village, Lake Johnson, the North Carolina Museum of Art and historic Saint Mary's School. Primary thoroughfares serving West Raleigh, in addition to Hillsborough Street, are Avent Ferry Road, Blue Ridge Road, and Western Boulevard. The PNC Arena is also located here adjacent to the North Carolina State Fairgrounds. These are located approximately 2 miles from Rex Hospital.
What is the answer to this question: What is West Raleigh the home of?
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So... North Carolina State University

The problem: Answer a question about this article:
Westminster School and Westminster Abbey Choir School are also in the precincts of the abbey. It was natural for the learned and literate monks to be entrusted with education, and Benedictine monks were required by the Pope to maintain a charity school in 1179. The Choir School educates and trains the choirboys who sing for services in the Abbey.
What are also in the precincts of Westminster Abbey?
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The answer: Westminster School and Westminster Abbey Choir School

The problem: Answer a question about this article:
The Renaissance era was from 1400 to 1600. It was characterized by greater use of instrumentation, multiple interweaving melodic lines, and the use of the first bass instruments. Social dancing became more widespread, so musical forms appropriate to accompanying dance began to standardize.
Musical forms for dance began to standardize during what era?
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The answer:
Renaissance