Problem: The medieval city is a foundation of the Zähringer ruling family, which rose to power in Upper Burgundy in the 12th century. According to 14th century historiography (Cronica de Berno, 1309), Bern was founded in 1191 by Berthold V, Duke of Zähringen.
Who founded Bern?
The answer is the following: Berthold V, Duke of Zähringen

Problem: In 1820-1830’s the Ottoman Empire endured a number of strikes which challenged the existence of the country. The Greek Uprising (began in the spring of 1821) evidenced internal and military weakness of Ottoman Empire and caused severe atrocities by Ottoman military forces (see Chios massacre). The disbandment of the centuries-old Janissary corps by Sultan Mahmud II on 15 June 1826 (Auspicious Incident) was a good deed for the country in the longer term, but it has deprived the country from its army forces for the nearest future. In 1827 the allied Anglo-Franco-Russian fleet destroyed almost all the Ottoman naval forces during the Battle of Navarino. In 1830 Greece becomes an independent state after 10 years of independence war and the Russo-Turkish War of 1828–1829. According to the Treaty of Adrianople (1829) Russian and European commercial ships were authorized to freely pass through Black Sea straits, Serbia received autonomy, and Danubian Principalities (Moldavia and Walachia) became the territories under Russian protection.
In what year was the Janissary corp disbanded?
The answer is the following: 1826

Problem: A week after the implementation of the no-fly zone, NATO announced that it would be enforced. On 30 April a NATO airstrike killed Gaddafi's sixth son and three of his grandsons in Tripoli, though Gaddafi and his wife were unharmed. Western officials remained divided over whether Gaddafi was a legitimate military target under the U.N. Security Council resolution. U.S. Secretary of Defense Robert Gates said that NATO was "not targeting Gaddafi specifically" but that his command-and-control facilities were legitimate targets—including a facility inside his sprawling Tripoli compound that was hit with airstrikes on 25 April.
At the time of these events, what was Robert Gates' title?
The answer is the following: Secretary of Defense

Problem: Parallel to events in Germany, a movement began in Switzerland under the leadership of Huldrych Zwingli. Zwingli was a scholar and preacher, who in 1518 moved to Zurich. Although the two movements agreed on many issues of theology, some unresolved differences kept them separate. A long-standing resentment between the German states and the Swiss Confederation led to heated debate over how much Zwingli owed his ideas to Lutheranism. The German Prince Philip of Hesse saw potential in creating an alliance between Zwingli and Luther. A meeting was held in his castle in 1529, now known as the Colloquy of Marburg, which has become infamous for its failure. The two men could not come to any agreement due to their disputation over one key doctrine.
What did the Colloquy of Marburg become infamous for?
The answer is the following:
its failure