Input: Article: A major turning point in the development of DC machines took place in 1864, when Antonio Pacinotti described for the first time the ring armature with its symmetrically grouped coils closed upon themselves and connected to the bars of a commutator, the brushes of which delivered practically non-fluctuating current. The first commercially successful DC motors followed the invention by Zénobe Gramme who, in 1871, reinvented Pacinotti's design. In 1873, Gramme showed that his dynamo could be used as a motor, which he demonstrated to great effect at exhibitions in Vienna and Philadelphia by connecting two such DC motors at a distance of up to 2 km away from each other, one as a generator. (See also 1873 : l'expérience décisive [Decisive Workaround] .)

Now answer this question: How far from each other were the motors in Gramme's demonstrations?

Output: 2 km


Article: The language was first introduced in North America when Russian explorers voyaged into Alaska and claimed it for Russia during the 1700s. Although most colonists left after the United States bought the land in 1867, a handful stayed and preserved the Russian language in this region to this day, although only a few elderly speakers of this unique dialect are left. Sizable Russian-speaking communities also exist in North America, especially in large urban centers of the U.S. and Canada, such as New York City, Philadelphia, Boston, Los Angeles, Nashville, San Francisco, Seattle, Spokane, Toronto, Baltimore, Miami, Chicago, Denver and Cleveland. In a number of locations they issue their own newspapers, and live in ethnic enclaves (especially the generation of immigrants who started arriving in the early 1960s). Only about 25% of them are ethnic Russians, however. Before the dissolution of the Soviet Union, the overwhelming majority of Russophones in Brighton Beach, Brooklyn in New York City were Russian-speaking Jews. Afterward, the influx from the countries of the former Soviet Union changed the statistics somewhat, with ethnic Russians and Ukrainians immigrating along with some more Russian Jews and Central Asians. According to the United States Census, in 2007 Russian was the primary language spoken in the homes of over 850,000 individuals living in the United States.

Question: When did the US buy Alaska?
Ans: 1867


Here is a question about this article: Josip Broz Tito (Cyrillic: Јосип Броз Тито, pronounced [jǒsip brôːz tîto]; born Josip Broz; 7 May 1892[nb 1] – 4 May 1980) was a Yugoslav revolutionary and statesman, serving in various roles from 1943 until his death in 1980. During World War II he was the leader of the Partisans, often regarded as the most effective resistance movement in occupied Europe. While his presidency has been criticized as authoritarian, and concerns about the repression of political opponents have been raised, Tito was "seen by most as a benevolent dictator" due to his economic and diplomatic policies. He was a popular public figure both in Yugoslavia and abroad. Viewed as a unifying symbol, his internal policies maintained the peaceful coexistence of the nations of the Yugoslav federation. He gained further international attention as the chief leader of the Non-Aligned Movement, working with Jawaharlal Nehru of India, Gamal Abdel Nasser of Egypt and Sukarno of Indonesia.
What is the answer to this question: During World War II what resistance movement did he lead?
****
So... the Partisans,


The problem: Answer a question about this article:
After the meeting, Darwin decided to write "an abstract of my whole work". He started work on 20 July 1858, while on holiday at Sandown, and wrote parts of it from memory. Lyell discussed arrangements with publisher John Murray III, of the publishing house John Murray, who responded immediately to Darwin's letter of 31 March 1859 with an agreement to publish the book without even seeing the manuscript, and an offer to Darwin of 2⁄3 of the profits. (eventually Murray paid £180 to Darwin for the 1st edition and by Darwin's death in 1882 the book was in its 6th edition, earning Darwin nearly £3000.)
What did Darwin decide to write in July, 1858?
****
The answer: "an abstract of my whole work".


Problem: Please answer a question about the following article about Antenna (radio):
Maximum power transfer requires matching the impedance of an antenna system (as seen looking into the transmission line) to the complex conjugate of the impedance of the receiver or transmitter. In the case of a transmitter, however, the desired matching impedance might not correspond to the dynamic output impedance of the transmitter as analyzed as a source impedance but rather the design value (typically 50 ohms) required for efficient and safe operation of the transmitting circuitry. The intended impedance is normally resistive but a transmitter (and some receivers) may have additional adjustments to cancel a certain amount of reactance in order to "tweak" the match. When a transmission line is used in between the antenna and the transmitter (or receiver) one generally would like an antenna system whose impedance is resistive and near the characteristic impedance of that transmission line in order to minimize the standing wave ratio (SWR) and the increase in transmission line losses it entails, in addition to supplying a good match at the transmitter or receiver itself.
Why would a transmitter have additional adjustments?
A: "tweak" the match


Question: Read this and answer the question

Corruption is not specific to poor, developing, or transition countries. In western countries, cases of bribery and other forms of corruption in all possible fields exist: under-the-table payments made to reputed surgeons by patients attempting to be on top of the list of forthcoming surgeries, bribes paid by suppliers to the automotive industry in order to sell low-quality connectors used for instance in safety equipment such as airbags, bribes paid by suppliers to manufacturers of defibrillators (to sell low-quality capacitors), contributions paid by wealthy parents to the "social and culture fund" of a prestigious university in exchange for it to accept their children, bribes paid to obtain diplomas, financial and other advantages granted to unionists by members of the executive board of a car manufacturer in exchange for employer-friendly positions and votes, etc. Examples are endless. These various manifestations of corruption can ultimately present a danger for the public health; they can discredit specific, essential institutions or social relationships.

These types of corruption can harm what?
Answer:
the public health