system
Context: Germany, officially the Federal Republic of Germany, is a federal parliamentary republic in central-western Europe. It includes 16 constituent states, covers an area of , and has a largely temperate seasonal climate. With about 82 million inhabitants, Germany is the most populous member state of the European Union. After the United States, it is the second most popular immigration destination in the world. Germany's capital and largest metropolis is Berlin, while its largest conurbation is the Ruhr, with its main centres of Dortmund and Essen. The country's other major cities are Hamburg, Munich, Cologne, Frankfurt, Stuttgart, Düsseldorf, Leipzig, Bremen, Dresden, Hannover and Nuremberg. 

Various Germanic tribes have inhabited the northern parts of modern Germany since classical antiquity. A region named Germania was documented before 100 AD. During the Migration Period, the Germanic tribes expanded southward. Beginning in the 10th century, German territories formed a central part of the Holy Roman Empire. During the 16th century, northern German regions became the centre of the Protestant Reformation. After the collapse of the Holy Roman Empire, the German Confederation was formed in 1815. The German revolutions of 1848–49 resulted in the Frankfurt Parliament establishing major democratic rights. 

In 1871, Germany became a nation state when most of the German states unified into the Prussian-dominated German Empire. After World War I and the German Revolution of 1918–19, the Empire was replaced by the parliamentary Weimar Republic. In 1933 the Nazi seizure of power quickly led to the establishment of Nazi Germany which was built upon a dictatorship and consequently led to World War II and the Holocaust. After the end of World War II in Europe and a period of Allied occupation, two German states were founded: the democratic West Germany and the socialist East Germany. Following the Revolutions of 1989 that ended communist rule in Central and Eastern Europe, the country was reunified on 3 October 1990.
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When did Germany become a nation state?
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In 1871
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What years were the German Revolution?
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1918–19.
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After that event, What was the Empire replaced by?
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Weimar Republic.
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When did the Nazi seizure of power happen?
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In 1933
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Did this lead to the establishment of Nazi Germany?
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Yes
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What was that built upon?
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A dictatorship
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How many events did that cause?
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Two.
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What was the first one?
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World War II
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And the second?
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The Holocaust.
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How many states were established after World War II?
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Two
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What were they?
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West Germany and East Germany.
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Which one was democratic?
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West Germany
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What year did communism end?
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1989
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When was the country brought back together?
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3 October 1990.
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Since what time period have Germanic tribes been in parts of Germany?
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Since classical antiquity.
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Was there a recorded region before 100 AD?
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Yes
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What was it called?
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Germania
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Where did the tribes branch out to in the migration period?
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Southward.
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What is the official name of Germany?
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Federal Republic of Germany,
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What is Germany's capital?
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Berlin