Problem: Transistor:

Because the electron mobility is higher than the hole mobility for all semiconductor materials, a given bipolar n–p–n transistor tends to be swifter than an equivalent p–n–p transistor. GaAs has the highest electron mobility of the three semiconductors. It is for this reason that GaAs is used in high-frequency applications. A relatively recent FET development, the high-electron-mobility transistor (HEMT), has a heterostructure (junction between different semiconductor materials) of aluminium gallium arsenide (AlGaAs)-gallium arsenide (GaAs) which has twice the electron mobility of a GaAs-metal barrier junction. Because of their high speed and low noise, HEMTs are used in satellite receivers working at frequencies around 12 GHz. HEMTs based on gallium nitride and aluminium gallium nitride (AlGaN/GaN HEMTs) provide a still higher electron mobility and are being developed for various applications.

What causes HEMTs to have high speed and low noise?
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A: unanswerable


Problem: Roughly one-third of the world's population has been infected with M. tuberculosis, with new infections occurring in about 1% of the population each year. However, most infections with M. tuberculosis do not cause TB disease, and 90–95% of infections remain asymptomatic. In 2012, an estimated 8.6 million chronic cases were active. In 2010, 8.8 million new cases of TB were diagnosed, and 1.20–1.45 million deaths occurred, most of these occurring in developing countries. Of these 1.45 million deaths, about 0.35 million occur in those also infected with HIV.
How many patients were diagnosed with tuberculosis in 2010?
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Answer: 8.8 million


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
With Eisenhower's leadership and Dulles' direction, CIA activities increased under the pretense of resisting the spread of communism in poorer countries; the CIA in part deposed the leaders of Iran in Operation Ajax, of Guatemala through Operation Pbsuccess, and possibly the newly independent Republic of the Congo (Léopoldville). In 1954 Eisenhower wanted to increase surveillance inside the Soviet Union. With Dulles' recommendation, he authorized the deployment of thirty Lockheed U-2's at a cost of $35 million. The Eisenhower administration also planned the Bay of Pigs Invasion to overthrow Fidel Castro in Cuba, which John F. Kennedy was left to carry out."
What CIA operation toppled the Guatemalan government?
A: Pbsuccess


Context and question: After the capital of India moved to Delhi, a temporary secretariat building was constructed in a few months in 1912 in North Delhi. Most of the government offices of the new capital moved here from the 'Old secretariat' in Old Delhi (the building now houses the Delhi Legislative Assembly), a decade before the new capital was inaugurated in 1931. Many employees were brought into the new capital from distant parts of India, including the Bengal Presidency and Madras Presidency. Subsequently housing for them was developed around Gole Market area in the 1920s. Built in the 1940s, to house government employees, with bungalows for senior officials in the nearby Lodhi Estate area, Lodhi colony near historic Lodhi Gardens, was the last residential areas built by the British Raj.
In what year what New Delhi inaugurated as the capital of India?
Answer: 1931


Question: Immigration to Israel during the late 1940s and early 1950s was aided by the Israeli Immigration Department and the non-government sponsored Mossad LeAliyah Bet ("Institution for Illegal Immigration"). Both groups facilitated regular immigration logistics like arranging transportation, but the latter also engaged in clandestine operations in countries, particularly in the Middle East and Eastern Europe, where the lives of Jews were believed to be in danger and exit from those places was difficult. Mossad LeAliyah Bet continued to take part in immigration efforts until its disbanding in 1953. An influx of Holocaust survivors and Jews from Arab and Muslim lands immigrated to Israel during the first 3 years and the number of Jews increased from 700,000 to 1,400,000, many of whom faced persecution in their original countries. The immigration was in accordance with the One Million Plan.
Is there an answer to this question: Who aided the immigration to Israel?

Answer: Israeli Immigration Department


In 1355 in Buda King Casimir III the Great issued the first country-wide privilege for the nobility, in exchange for their agreement that in the lack of Casimir's male heirs, the throne would pass to his nephew, Louis I of Hungary. He decreed that the nobility would no longer be subject to 'extraordinary' taxes, or use their own funds for military expeditions abroad. He also promised that during travels of the royal court, the king and the court would pay for all expenses, instead of using facilities of local nobility.
If it is possible to answer this question, answer it for me (else, reply "unanswerable"): WHo is the nephew of buda king casimer III the great?
Ah, so..
Louis I of Hungary