Problem: Light-emitting diode:

The structure of QD-LEDs used for the electrical-excitation scheme is similar to basic design of OLEDs. A layer of quantum dots is sandwiched between layers of electron-transporting and hole-transporting materials. An applied electric field causes electrons and holes to move into the quantum dot layer and recombine forming an exciton that excites a QD. This scheme is commonly studied for quantum dot display. The tunability of emission wavelengths and narrow bandwidth is also beneficial as excitation sources for fluorescence imaging. Fluorescence near-field scanning optical microscopy (NSOM) utilizing an integrated QD-LED has been demonstrated.

A Quantum Dot LED has been used in what?
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A: near-field scanning optical microscopy (NSOM)


Problem: The University of Kansas Medical Center features three schools: the School of Medicine, School of Nursing, and School of Health Professions. Furthermore, each of the three schools has its own programs of graduate study. As of the Fall 2013 semester, there were 3,349 students enrolled at KU Med. The Medical Center also offers four year instruction at the Wichita campus, and features a medical school campus in Salina, Kansas that is devoted to rural health care.
At what other KU campus is a two year program available?
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Answer: unanswerable


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Although his support had been essential to Shunzhi's ascent, Dorgon had through the years centralised so much power in his hands as to become a direct threat to the throne. So much so that upon his death he was extraordinarily bestowed the posthumous title of Emperor Yi (Chinese: 義皇帝), the only instance in Qing history in which a Manchu "prince of the blood" (Chinese: 親王) was so honored. Two months into Shunzhi's personal rule, Dorgon was not only stripped of his titles, but his corpse was disinterred and mutilated.[b] to atone for multiple "crimes", one of which was persecuting to death Shunzhi’s agnate eldest brother, Hooge. More importantly, Dorgon's symbolic fall from grace also signaled a political purge of his family and associates at court, thus reverting power back to the person of the emperor. After a promising start, Shunzhi's reign was cut short by his early death in 1661 at the age of twenty-four from smallpox. He was succeeded by his third son Xuanye, who reigned as the Kangxi Emperor.
How old was Shunzhi at his death?
A: twenty-four


Context and question: The Space Age is a period encompassing the activities related to the Space Race, space exploration, space technology, and the cultural developments influenced by these events. The Space Age began with the development of several technologies that culminated with the launch of Sputnik 1 by the Soviet Union. This was the world's first artificial satellite, orbiting the Earth in 98.1 minutes and weighing in at 83 kg. The launch of Sputnik 1 ushered a new era of political, scientific and technological achievements that became known as the Space Age. The Space Age was characterized by rapid development of new technology in a close race mostly between the United States and the Soviet Union. The Space Age brought the first human spaceflight during the Vostok programme and reached its peak with the Apollo program which captured the imagination of much of the world's population. The landing of Apollo 11 was an event watched by over 500 million people around the world and is widely recognized as one of the defining moments of the 20th century. Since then and with the end of the space race due to the dissolution of the Soviet Union, public attention has largely moved to other areas.
How many people watched the Apollo 11 landing?
Answer: 500 million


Question: At the time of her accession, the government was led by the Whig prime minister Lord Melbourne, who at once became a powerful influence on the politically inexperienced Queen, who relied on him for advice. Charles Greville supposed that the widowed and childless Melbourne was "passionately fond of her as he might be of his daughter if he had one", and Victoria probably saw him as a father figure. Her coronation took place on 28 June 1838 at Westminster Abbey. Over 400,000 visitors came to London for the celebrations. She became the first sovereign to take up residence at Buckingham Palace and inherited the revenues of the duchies of Lancaster and Cornwall as well as being granted a civil list allowance of £385,000 per year. Financially prudent, she paid off her father's debts.
Is there an answer to this question: How many people visited London for the Coronation of Queen Victoria? 

Answer: 400,000


Q: What is a question about this article? If the question is unanswerable, say "unanswerable".
Within the white inescutcheon, the five quinas (small blue shields) with their five white bezants representing the five wounds of Christ (Portuguese: Cinco Chagas) when crucified and are popularly associated with the "Miracle of Ourique". The story associated with this miracle tells that before the Battle of Ourique (25 July 1139), an old hermit appeared before Count Afonso Henriques (future Afonso I) as a divine messenger. He foretold Afonso's victory and assured him that God was watching over him and his peers. The messenger advised him to walk away from his camp, alone, if he heard a nearby chapel bell tolling, in the following night. In doing so, he witnessed an apparition of Jesus on the cross. Ecstatic, Afonso heard Jesus promising victories for the coming battles, as well as God's wish to act through Afonso, and his descendants, in order to create an empire which would carry His name to unknown lands, thus choosing the Portuguese to perform great tasks.
Afonso heard Jesus promising what?
A:
victories for the coming battles, as well as God's wish to act through Afonso