Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
There has, however, been interest among railroad operators in returning to DC use at higher voltages than previously used. At the same voltage, DC often has less loss than AC, and for this reason high-voltage direct current is already used on some bulk power transmission lines. DC avoids the electromagnetic radiation inherent with AC, and on a railway this also reduces interference with signalling and communications and mitigates hypothetical EMF risks. DC also avoids the power factor problems of AC. Of particular interest to railroading is that DC can supply constant power with a single ungrounded wire. Constant power with AC requires three-phase transmission with at least two ungrounded wires. Another important consideration is that mains-frequency 3-phase AC must be carefully planned to avoid unbalanced phase loads. Parts of the system are supplied from different phases on the assumption that the total loads of the 3 phases will even out. At the phase break points between regions supplied from different phases, long insulated supply breaks are required to avoid them being shorted by rolling stock using more than one pantograph at a time. A few railroads have tried 3-phase but its substantial complexity has made single-phase standard practice despite the interruption in power flow that occurs twice every cycle. An experimental 6 kV DC railway was built in the Soviet Union.
What type of electric power garantees lesser loss?
A: DC

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
On July 1, 1985, Gorbachev promoted Eduard Shevardnadze, First Secretary of the Georgian Communist Party, to full member of the Politburo, and the following day appointed him minister of foreign affairs, replacing longtime Foreign Minister Andrei Gromyko. The latter, disparaged as "Mr Nyet" in the West, had served for 28 years as Minister of Foreign Affairs. Gromyko was relegated to the largely ceremonial position of Chairman of the Presidium of the Supreme Soviet (officially Soviet Head of State), as he was considered an "old thinker." Also on July 1, Gorbachev took the opportunity to dispose of his main rival by removing Grigory Romanov from the Politburo, and brought Boris Yeltsin and Lev Zaikov into the CPSU Central Committee Secretariat.
Who was responsible for Shevardnadze's membership?
A: Gorbachev

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
As the century wore on, the factions slowly began to adopt more coherent political tendencies as the interests of their power bases began to diverge. The Whig party's initial base of support from the great aristocratic families, widened to include the emerging industrial interests and wealthy merchants. As well as championing constitutional monarchy with strict limits on the monarch's power, the Whigs adamantly opposed a Catholic king as a threat to liberty, and believed in extending toleration to nonconformist Protestants, or dissenters. A major influence on the Whigs were the liberal political ideas of John Locke, and the concepts of universal rights employed by Locke and Algernon Sidney.
Who's concepts of universal rights influenced wealthy merchants?
A: unanswerable

Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Up until the mid-14th century, Europe had experienced steadily increasing urbanisation. Cities were also decimated by the Black Death, but the role of urban areas as centres of learning, commerce and government ensured continued growth. By 1500, Venice, Milan, Naples, Paris and Constantinople each probably had more than 100,000 inhabitants. Twenty-two other cities were larger than 40,000; most of these were in Italy and the Iberian peninsula, but there were also some in France, the Empire, the Low Countries, plus London in England.
Which European cities likely had populations greater than 1,000,000 in 1500?
A:
unanswerable