Problem: Copyright infringement:

In the U.S., for example, copyright case law contains a substantial similarity requirement to determine whether the work was copied. Likewise, courts may require computer software to pass an Abstraction-Filtration-Comparison test (AFC Test) to determine if it is too abstract to qualify for protection, or too dissimilar to an original work to be considered infringing. Software-related case law has also clarified that the amount of R&D, effort and expense put into a work's creation doesn't affect copyright protection.

Which country needs a similarity requirement to determine if the work wasn't copied?
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A: unanswerable

Problem: Kievan Rus%27:

Kievan Rus' also played an important genealogical role in European politics. Yaroslav the Wise, whose stepmother belonged to the Macedonian dynasty, the greatest one to rule Byzantium, married the only legitimate daughter of the king who Christianized Sweden. His daughters became queens of Hungary, France and Norway, his sons married the daughters of a Polish king and a Byzantine emperor (not to mention a niece of the Pope), while his granddaughters were a German Empress and (according to one theory) the queen of Scotland. A grandson married the only daughter of the last Anglo-Saxon king of England. Thus the Rurikids were a well-connected royal family of the time.

Whose stepmother did not belong to a Macedonian dynasty?
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A: unanswerable

Problem: United States presidential election, 2004:

At the official counting of the electoral votes on January 6, a motion was made contesting Ohio's electoral votes. Because the motion was supported by at least one member of both the House of Representatives and the Senate, election law mandated that each house retire to debate and vote on the motion. In the House of Representatives, the motion was supported by 31 Democrats. It was opposed by 178 Republicans, 88 Democrats and one independent. Not voting were 52 Republicans and 80 Democrats. Four people elected to the House had not yet taken office, and one seat was vacant. In the Senate, it was supported only by its maker, Senator Boxer, with 74 Senators opposed and 25 not voting. During the debate, no Senator argued that the outcome of the election should be changed by either court challenge or revote. Senator Boxer claimed that she had made the motion not to challenge the outcome, but to "shed the light of truth on these irregularities."

When was Boxer elected to office?
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A: unanswerable

Problem: Thuringia:

The traditional energy supply of Thuringia is lignite, mined in the bordering Leipzig region. Since 2000, the importance of environmentally unfriendly lignite combustion has declined in favour of renewable energies, which reached an amount of 40% (in 2013), and more clean gas combustion, often carried out as Cogeneration in the municipal power stations. The most important forms of renewable energies are Wind power and Biomass, followed by Solar energy and Hydroelectricity. Furthermore, Thuringia hosts two big pumped storage stations: the Goldisthal Pumped Storage Station and the Hohenwarte Dam.

What are Thuringia's least important renewable energy sources?
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A:
unanswerable