Problem: 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.

Due to the inefficient generation of electricity in the US, diesel traction was twice as energy efficient in what year?
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A: unanswerable


Problem: Constantine the Great, who along with Licinius had decreed toleration of Christianity in the Roman Empire by what is commonly called the "Edict of Milan", and was the first Roman Emperor baptized, set precedents for later policy. By Roman law the Emperor was Pontifex Maximus, the high priest of the College of Pontiffs (Collegium Pontificum) of all recognized religions in ancient Rome. To put an end to the doctrinal debate initiated by Arius, Constantine called the first of what would afterwards be called the ecumenical councils and then enforced orthodoxy by Imperial authority.
What did Constantine the Great and Licinius pass to introduce toleration of Christianity in the Roman Empire?
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Answer: Edict of Milan


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Nintendo staff members reported that demo users complained about the difficulty of the control scheme. Aonuma realized that his team had implemented Wii controls under the mindset of "forcing" users to adapt, instead of making the system intuitive and easy to use. He began rethinking the controls with Miyamoto to focus on comfort and ease.[q] The camera movement was reworked and item controls were changed to avoid accidental button presses.[r] In addition, the new item system required use of the button that had previously been used for the sword. To solve this, sword controls were transferred back to gestures—something E3 attendees had commented they would like to see. This reintroduced the problem of using a right-handed swing to control a left-handed sword attack. The team did not have enough time before release to rework Link's character model, so they instead flipped the entire game—everything was made a mirror image.[s] Link was now right-handed, and references to "east" and "west" were switched around. The GameCube version, however, was left with the original orientation. The Twilight Princess player's guide focuses on the Wii version, but has a section in the back with mirror-image maps for GameCube users.[t]
What features did Aonuma work to improve after the demo complaints?
A: comfort and ease


Context and question: Notable Greek scientists of modern times include Dimitrios Galanos, Georgios Papanikolaou (inventor of the Pap test), Nicholas Negroponte, Constantin Carathéodory (known for the Carathéodory theorems and Carathéodory conjecture), Manolis Andronikos (discovered the tomb of Philip II of Macedon in Vergina), Michael Dertouzos, John Argyris, Panagiotis Kondylis, John Iliopoulos (2007 Dirac Prize for his contributions on the physics of the charm quark, a major contribution to the birth of the Standard Model, the modern theory of Elementary Particles), Joseph Sifakis (2007 Turing Award, the "Nobel Prize" of Computer Science), Christos Papadimitriou (2002 Knuth Prize, 2012 Gödel Prize), Mihalis Yannakakis (2005 Knuth Prize), Dimitri Nanopoulos and Helene Ahrweiler.
What Greek won the 2005 Knuth prize?
Answer: Mihalis Yannakakis


Question: After the decline of the Teutonic Order following its defeat in the Battle of Grunwald in 1410, and the defeat of the Livonian Order in the Battle of Swienta on 1 September 1435, the Livonian Confederation Agreement was signed on 4 December 1435. The Livonian Confederation ceased to exist during the Livonian War (1558–82). The wars had reduced the Estonian population from about 250–300,000 people before the Livonian War to 120–140,000 in the 1620s. The Grand Duchy of Moscow and Tsardom of Russia also attempted invasions in 1481 and 1558, both of which were unsuccessful .
Is there an answer to this question: When did the Battle of Grunwald take place?

Answer: 1410


Problem: Anthropology:

Kinship can refer both to the study of the patterns of social relationships in one or more human cultures, or it can refer to the patterns of social relationships themselves. Over its history, anthropology has developed a number of related concepts and terms, such as "descent", "descent groups", "lineages", "affines", "cognates", and even "fictive kinship". Broadly, kinship patterns may be considered to include people related both by descent (one's social relations during development), and also relatives by marriage.

What is the study of human culture?
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A:
unanswerable