Article: The most extreme case was the Soviet Union, and this model may still be followed in some countries: it was a separate service, on a par with the navy or ground force. In the Soviet Union this was called Voyska PVO, and had both fighter aircraft and ground-based systems. This was divided into two arms, PVO Strany, the Strategic Air defence Service responsible for Air Defence of the Homeland, created in 1941 and becoming an independent service in 1954, and PVO SV, Air Defence of the Ground Forces. Subsequently these became part of the air force and ground forces respectively

Question: What two systems did Voyska PVO have?
Ans: fighter aircraft and ground-based systems

Article: Examples of Ottoman architecture of the classical period, besides Istanbul and Edirne, can also be seen in Egypt, Eritrea, Tunisia, Algiers, the Balkans and Romania, where mosques, bridges, fountains and schools were built. The art of Ottoman decoration developed with a multitude of influences due to the wide ethnic range of the Ottoman Empire. The greatest of the court artists enriched the Ottoman Empire with many pluralistic artistic influences: such as mixing traditional Byzantine art with elements of Chinese art.

Question: Ottoman artists mixed Chinese art with the art of what else?
Ans: traditional Byzantine art

Article: Average attendance for AFL games were around 10,00011,000 per game in the 1990s, though during the recession connected to the dot-com bubble and the September 11, 2001 attacks average attendance dropped below 10,000 for several years. From the start of the 2004 season until the final season of the original league in 2008, average attendance was above 12,000, with 12,392 in 2007. Eleven of the seventeen teams in operation in 2007 had average attendance figures over 13,000. In 2008, the overall attendance average increased to 12,957, with eight teams exceeding 13,000 per game.

Question: Along with the recession, what event is held to have decreased per-game attendance below 10,000?
Ans: the September 11, 2001 attacks

Article: This new development heralded an explosion in the commercial and personal use of computers and led to the invention of the microprocessor. While the subject of exactly which device was the first microprocessor is contentious, partly due to lack of agreement on the exact definition of the term "microprocessor", it is largely undisputed that the first single-chip microprocessor was the Intel 4004, designed and realized by Ted Hoff, Federico Faggin, and Stanley Mazor at Intel.

Question: Where did Ted Hoff, Federico Faggin, and Stanley Mazor work at?
Ans:
Intel.