Input: Read this: 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.
Question: Where was an experimental 6kV DC railway built?

Output: the Soviet Union

QUES: The Karabakh war ended after a Russian-brokered cease-fire was put in place in 1994. The war was a success for the Karabakh Armenian forces who managed to capture 16% of Azerbaijan's internationally recognised territory including Nagorno-Karabakh itself. Since then, Armenia and Azerbaijan have held peace talks, mediated by the Organisation for Security and Co-operation in Europe (OSCE). The status of Karabakh has yet to be determined. The economies of both countries have been hurt in the absence of a complete resolution and Armenia's borders with Turkey and Azerbaijan remain closed. By the time both Azerbaijan and Armenia had finally agreed to a ceasefire in 1994, an estimated 30,000 people had been killed and over a million had been displaced.

When did the Karabakh War end?
What is the answer?
ANS: 1994

QUES: At the 29 August Arab League summit in Khartoum, Nasser's usual commanding position had receded as the attending heads of state expected Saudi King Faisal to lead. A ceasefire in the Yemen War was declared and the summit concluded with the Khartoum Resolution. The Soviet Union soon resupplied the Egyptian military with about half of its former arsenals and broke diplomatic relations with Israel. Nasser cut relations with the US following the war, and, according to Aburish, his policy of "playing the superpowers against each other" ended. In November, Nasser accepted UN Resolution 242, which called for Israel's withdrawal from territories acquired in the war. His supporters claimed Nasser's move was meant to buy time to prepare for another confrontation with Israel, while his detractors believed his acceptance of the resolution signaled a waning interest in Palestinian independence.
What leader assumed a more prominent position due to Nasser's difficulites?

ANS: King Faisal

According to the American National Standards Institute, pitch is the auditory attribute of sound according to which sounds can be ordered on a scale from low to high. Since pitch is such a close proxy for frequency, it is almost entirely determined by how quickly the sound wave is making the air vibrate and has almost nothing to do with the intensity, or amplitude, of the wave. That is, "high" pitch means very rapid oscillation, and "low" pitch corresponds to slower oscillation. Despite that, the idiom relating vertical height to sound pitch is shared by most languages. At least in English, it is just one of many deep conceptual metaphors that involve up/down. The exact etymological history of the musical sense of high and low pitch is still unclear. There is evidence that humans do actually perceive that the source of a sound is slightly higher or lower in vertical space when the sound frequency is increased or decreased.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): High pitch is what type of oscillation?
Ah, so.. rapid

Question: As of 2011, there have been six series Digimon Adventure, the follow-up sequel Digimon Adventure 02, Digimon Tamers, Digimon Frontier, Digimon Data Squad and Digimon Fusion. The first two series take place in the same fictional universe, but the third, fourth, fifth and sixth each occupy their own unique world. Each series is commonly based on the original storyline but things are added to make them unique. However, in Tamers, the Adventure universe is referred to as a commercial enterprise a trading card game in Japan, plus a show-within-a-show in the English dub. It also features an appearance by a character from the Adventure universe. In addition, each series has spawned assorted feature films. Digimon still shows popularity, as new card series, video games, and movies are still being produced and released: new card series include Eternal Courage, Hybrid Warriors, Generations, and Operation X; the video game, Digimon Rumble Arena 2; and the previously unreleased movies Revenge of Diaboromon, Runaway Locomon, Battle of Adventurers, and Island of Lost Digimon. In Japan, Digital Monster X-Evolution, the eighth TV movie, was released on January 3, 2005, and on December 23, 2005 at Jump Festa 2006, the fifth series, Digimon Savers was announced for Japan to begin airing after a three-year hiatus of the show. A sixth television series, Digimon Xros Wars, began airing in 2010, and was followed by a second season, which started on October 2, 2011 as a direct sequel to Digimon Xros Wars.
Try to answer this question if possible: How many series of aired as of 2001?
Answer: unanswerable

Input: Read this: The Great Plains come to an abrupt end at the Rocky Mountains. The Rocky Mountains form a large portion of the Western U.S., entering from Canada and stretching nearly to Mexico. The Rocky Mountain region is the highest region of the United States by average elevation. The Rocky Mountains generally contain fairly mild slopes and wider peaks compared to some of the other great mountain ranges, with a few exceptions (such as the Teton Mountains in Wyoming and the Sawatch Range in Colorado). The highest peaks of the Rockies are found in Colorado, the tallest peak being Mount Elbert at 14,440 ft (4,400 m). The Rocky Mountains contain some of the most spectacular, and well known scenery in the world. In addition, instead of being one generally continuous and solid mountain range, it is broken up into a number of smaller, intermittent mountain ranges, forming a large series of basins and valleys.
Question: Where did the Great Plains come to a gradual and at?

Output:
unanswerable