Problem: German beacons operated on the medium-frequency band and the signals involved a two-letter Morse identifier followed by a lengthy time-lapse which enabled the Luftwaffe crews to determine the signal's bearing. The Meacon system involved separate locations for a receiver with a directional aerial and a transmitter. The receipt of the German signal by the receiver was duly passed to the transmitter, the signal to be repeated. The action did not guarantee automatic success. If the German bomber flew closer to its own beam than the Meacon then the former signal would come through the stronger on the direction finder. The reverse would apply only if the meacon were closer.
The German beacons used what frequency band?
The answer is the following: medium

Von Neumann raised the intellectual and mathematical level of economics in several stunning publications. For his model of an expanding economy, von Neumann proved the existence and uniqueness of an equilibrium using his generalization of the Brouwer fixed-point theorem. Von Neumann's model of an expanding economy considered the matrix pencil A B with nonnegative matrices A and B; von Neumann sought probability vectors p and q and a positive number that would solve the complementarity equation
What did von Neumann consider for his model of expanding economy?
matrix pencil A B with nonnegative matrices A and B

Input: Strasbourg
Strasbourg, well known as centre of humanism, has a long history of excellence in higher-education, at the crossroads of French and German intellectual traditions. Although Strasbourg had been annexed by the Kingdom of France in 1683, it still remained connected to the German-speaking intellectual world throughout the 18th century and the university attracted numerous students from the Holy Roman Empire, including Goethe, Metternich and Montgelas, who studied law in Strasbourg, among the most prominent. Nowadays, Strasbourg is known to offer among the best university courses in France, after Paris.

When was Strasbourg annexed by the Kingdom of France?
Output: 1683

Input: Article: The playing time of a phonograph record depended on the turntable speed and the groove spacing. At the beginning of the 20th century, the early discs played for two minutes, the same as early cylinder records. The 12-inch disc, introduced by Victor in 1903, increased the playing time to three and a half minutes. Because a 10-inch 78 rpm record could hold about three minutes of sound per side and the 10-inch size was the standard size for popular music, almost all popular recordings were limited to around three minutes in length. For example, when King Oliver's Creole Jazz Band, including Louis Armstrong on his first recordings, recorded 13 sides at Gennett Records in Richmond, Indiana, in 1923, one side was 2:09 and four sides were 2:522:59.

Now answer this question: What factors would effect playing time of a phonograph?

Output: turntable speed and the groove spacing

Article: The National Hockey League's Carolina Hurricanes franchise moved to Raleigh in 1997 from Hartford, Connecticut (where it was known as the Hartford Whalers). The team played its first two seasons more than 60 miles away at Greensboro Coliseum while its home arena, Raleigh Entertainment and Sports Arena (later RBC Center and now PNC Arena), was under construction. The Hurricanes are the only major league (NFL, NHL, NBA, MLB) professional sports team in North Carolina to have won a championship, winning the Stanley Cup in 2006, over the Edmonton Oilers. The city played host to the 2011 NHL All-Star Game.

Question: What is the only professional sports team in North Carolina?
Ans: National Hockey League's Carolina Hurricanes

Input: Modern history
The Holocaust (which roughly means "burnt whole") was the deliberate and systematic murder of millions of Jews and other "unwanted" during World War II by the Nazi regime in Germany. Several differing views exist regarding whether it was intended to occur from the war's beginning, or if the plans for it came about later. Regardless, persecution of Jews extended well before the war even started, such as in the Kristallnacht (Night of Broken Glass). The Nazis used propaganda to great effect to stir up anti-Semitic feelings within ordinary Germans.

How did the Nazis conjure up anti-Semitic feelings in civilians?
Output:
propaganda