Berlin is the capital and the largest city of Germany as well as one of its 16 constituent states. With a population of approximately 3.7 million, Berlin is the second most populous city proper in the European Union and the seventh most populous urban area in the European Union. Located in northeastern Germany on the banks of the rivers Spree and Havel, it is the centre of the Berlin-Brandenburg Metropolitan Region, which has roughly 6 million residents from more than 180 nations. Due to its location in the European Plain, Berlin is influenced by a temperate seasonal climate. Around one-third of the city's area is composed of forests, parks, gardens, rivers, canals and lakes. 

First documented in the 13th century and situated at the crossing of two important historic trade routes, Berlin became the capital of the Margraviate of Brandenburg (14171701), the Kingdom of Prussia (1701–1918), the German Empire (1871–1918), the Weimar Republic (1919–1933) and the Third Reich (1933–1945). Berlin in the 1920s was the third largest municipality in the world. After World War II and its subsequent occupation by the victorious countries, the city was divided; East Berlin was declared capital of East Germany, while West Berlin became a de facto West German exclave, surrounded by the Berlin Wall (1961–1989) and East German territory. Following German reunification in 1990, Berlin once again became the capital of all of Germany. QUESTIONS:

Q1:
1. How many constituent states does Germany have?
2. What is the number of states in Germany?
3. How many states are there in Germany?
Q2:
1. In what state is Germany's capital located?
2. In what state is the city of Berlin located?
3. What state contains Germany's capital city?
Q3:
1. Is Berlin the capital of Germany?
2. Is Berlin Germany's capital city?
3. Is Berlin the nation's capital?
Q4:
1. Is Berlin the largest city in Germany?
2. Is Berlin larger than all other German cities?
3. Does Berlin count as the biggest city in Germany?
Q5:
1. Is Berlin the largest city in the EU?
2. Is Berlin the most populous city in the EU?
3. Does Berlin have the largest city population in the European Union?
Q6:
1. Is Berlin the second most populous city of the EU?
2. Is Berlin the second most populous city proper in the European Union?
3. Does Berlin have the second largest city population in the European Union?
Q7:
1. What rivers is Berlin situated on?
2. Berlin is located on the banks of what rivers?
3. What are the rivers that flow through Berlin?
Q8:
1. In what part of Germany is Berlin located?
2. In what geographical region of Germany can Berlin be found?
3. What is Berlin's geographical location within Germany?
Q9:
1. In what metro region is Berlin located in?
2. What metropolitan region houses Berlin?
3. What is the name of Berlin's metropolitan region?
Q10:
1. Is Berlin located in the European Plain?
2. Is Berlin situated within the European Plain?
3. Is Berlin found in the European Plain?
Q11:
1. What is the population of the Berlin-Brandenburg Metropolitan Region?
2. How many residents are in the Berlin-Brandenburg Metropolitan Region?
3. Approximately how many people live in the Berlin-Brandenburg Metropolitan Region?
Q12:
1. What fraction of the city of Berlin is composed of nature?
2. Nature makes up for how much of the city of Berlin?
3. How much of Berlin is composed of nature?
Q13:
1. When did Berlin become the capital of the Margraviate of Brandenburg?
2. In what year was the Margraviate of Brandenburg founded?
3. In what year was Berlin named the capital of the Margraviate of Brandenburg?
Q14:
1. How long did the German Empire last?
2. How long did Berlin serve as capital of the German Empire?
3. For what span of time was Berlin the capital of the German Empire?
Q15:
1. How long did the Weimar Republic last?
2. How long did Berlin serve as capital of the Weimar Republic?
3. For what span of time was Berlin the capital of the Weimar Republic?
Q16:
1. How long did the Third Reich last?
2. How long did Berlin serve as capital of the Third Reich?
3. For what span of time was Berlin the capital of the Third Reich?
Q17:
1. When was Berlin split up?
2. When did Berlin become divided?
3. When was Berlin broken up?
Q18:
1. Who divided Berlin after the second World War?
2. Who separated Berlin after World War II?
3. What powers broke up Berlin after World War II?
Q19:
1. During what years was the Berlin Wall active?
2. For what span of time did the Berlin Wall stand?
3. When was Berlin divided by the wall?
Q20:
1. In what year was Germany reunified?
2. When did German reunification occur?
3. When did reunification allow Berlin to become the single capital of Germany?
