Problem: During the Middle Ages, Thuringia was situated at the border between Germanic and Slavic territories, marked by the Saale river. The Ostsiedlung movement led to the assimilation of Slavic people between the 11th and the 13th century under German rule. The population growth increased during the 18th century and stayed high until World War I, before it slowed within the 20th century and changed to a decline since 1990. Since the beginning of Urbanisation around 1840, the Thuringian cities have higher growth rates resp. smaller rates of decline than rural areas (many villages lost half of their population since 1950, whereas the biggest cities (Erfurt and Jena) keep growing).
Where was Thuringia in the Middle Ages?
The answer is the following: the border between Germanic and Slavic territories

Problem: In separate testimony to Financial Crisis Inquiry Commission, officers of Clayton Holdingsthe largest residential loan due diligence and securitization surveillance company in the United States and Europetestified that Clayton's review of over 900,000 mortgages issued from January 2006 to June 2007 revealed that scarcely 54% of the loans met their originators' underwriting standards. The analysis (conducted on behalf of 23 investment and commercial banks, including 7 "too big to fail" banks) additionally showed that 28% of the sampled loans did not meet the minimal standards of any issuer. Clayton's analysis further showed that 39% of these loans (i.e. those not meeting any issuer's minimal underwriting standards) were subsequently securitized and sold to investors.
How many mortgage loans did Clayton Holdings review in their analysis?
The answer is the following: 900,000

Problem: Thus, Buckingham Palace is a symbol and home of the British monarchy, an art gallery and a tourist attraction. Behind the gilded railings and gates which were completed by the Bromsgrove Guild in 1911 and Webb's famous facade, which has been described in a book published by the Royal Collection as looking "like everybody's idea of a palace", is not only a weekday home of the Queen and Prince Philip but also the London residence of the Duke of York and the Earl and Countess of Wessex. The palace also houses the offices of the Queen, Prince Philip, Duke of York, Earl and Countess of Wessex, Princess Royal, and Princess Alexandra, and is the workplace of more than 800 people.
In what year were the railings and gates completed?
The answer is the following: 1911

Problem: Following Nazi Germany's defeat in World War II in 1945, East Prussia was partitioned between Poland and the Soviet Union according to the Potsdam Conference. Southern East Prussia was placed under Polish administration, while northern East Prussia was divided between the Soviet republics of Russia (the Kaliningrad Oblast) and Lithuania (the constituent counties of the Klaipeda Region). The city of Konigsberg was renamed Kaliningrad in 1946. The German population of the province largely evacuated during the war, but several hundreds of thousands died during the years 194446 and the remainder were subsequently expelled.
What was the city of Konigsberg renamed in to in 1946?
The answer is the following:
Kaliningrad