Question: What city does Bundestag and Reichstag building have in common?
Related documents: [0]  [DOC] The Reichstag (German: "Reichstagsgebäude" ] ; officially: "Deutscher Bundestag - Plenarbereich Reichstagsgebäude" ] ) is a historic edifice in Berlin, Germany, constructed to house the Imperial Diet (German: "Reichstag"), of the German Empire. It was opened in 1894 and housed the Diet until 1933, when it was severely damaged after being set on fire. After World War II, the building fell into disuse; the parliament of the German Democratic Republic (the "Volkskammer") met in the "Palast der Republik" in East Berlin, while the parliament of the Federal Republic of Germany (the "Bundestag") met in the "Bundeshaus" in Bonn. [END] 
[1]  [DOC] Bundestag is a Berlin U-Bahn station located on the U55 . The name of this station was changed in April 2006 from Reichstag to Bundestag after deputations from the Bundestag which sits in the Reichstag building. [END] 
Answer: 
Berlin
Berlin