paragraph_text: After Germany surrendered, the Allies partitioned Berlin and Germany's remaining territory into four military occupation zones. The western sectors, controlled by France, the United Kingdom, and the United States, were merged on 23 May 1949 to form the Federal Republic of Germany (Bundesrepublik Deutschland); on 7 October 1949, the Soviet Zone became the German Democratic Republic (Deutsche Demokratische Republik). They were informally known as West Germany and East Germany. East Germany selected East Berlin as its capital, while West Germany chose Bonn as a provisional capital, to emphasize its stance that the two - state solution was an artificial and temporary status quo.

paragraph_text: Athlete Nation Olympics Gold Silver Bronze Total Pechstein, Claudia Claudia Pechstein Germany (GER) 1992 -- 2006 5 9 Wust, Ireen Ireen Wüst Netherlands (NED) 2006 -- 2014 8 Enke, Karin Karin Enke East Germany (GDR) 1980 -- 1988 8 Niemann, Gunda Gunda Niemann Germany (GER) 1988 -- 1998 8 Thunberg, Clas Clas Thunberg Finland (FIN) 1924 -- 1928 5 7 Ballangrud, Ivar Ivar Ballangrud Norway (NOR) 1928 -- 1936 7 Kramer, Sven Sven Kramer Netherlands (NED) 2006 -- 2014 7 Schone, Andrea Andrea Schöne East Germany (GDR) 1976 -- 1988 5 7 Skoblikova, Lidiya Lidiya Skoblikova Soviet Union (URS) 1960 -- 1968 6 0 0 6 Blair, Bonnie Bonnie Blair United States (USA) 1984 -- 1994 5 0 6 Klassen, Cindy Cindy Klassen Canada (CAN) 2002 -- 2006 6 Ritsma, Rintje Rintje Ritsma Netherlands (NED) 1992 -- 2006 0 6 Larsen, Roald Roald Larsen Norway (NOR) 1924 -- 1928 0 6 Heiden, Eric Eric Heiden United States (USA) 1976 -- 1980 5 0 0 5 Koss, Johann Olav Johann Olav Koss Norway (NOR) 1992 -- 1994 0 5 Grishin, Yevgeny Yevgeny Grishin Soviet Union (URS) 1956 -- 1968 0 5 Sablikova, Martina Martina Sáblíková Czech Republic (CZE) 2006 -- 2014 5 Friesinger - Postma, Anni Anni Friesinger - Postma Germany (GER) 1998 -- 2010 0 5 Johannesen, Knut Knut Johannesen Norway (NOR) 1956 -- 1964 5 Hedrick, Chad Chad Hedrick United States (USA) 2006 -- 2010 5

paragraph_text: The Schermützelsee is a lake in Brandenburg, Germany. It is located in the town of Buckow in the district Märkisch-Oderland northwest of Müncheberg and east of the Berlin centre. With its surface area of 1.37 km² it is the largest water in the hill country „Märkische Schweiz“ and in the Märkische Schweiz Nature Park.

paragraph_text: The Rohingya people have consistently faced human rights abuses by the Burmese regime that has refused to acknowledge them as Burmese citizens (despite some of them having lived in Burma for over three generations)—the Rohingya have been denied Burmese citizenship since the enactment of a 1982 citizenship law. The law created three categories of citizenship: citizenship, associate citizenship, and naturalised citizenship. Citizenship is given to those who belong to one of the national races such as Kachin, Kayah (Karenni), Karen, Chin, Burman, Mon, Rakhine, Shan, Kaman, or Zerbadee. Associate citizenship is given to those who cannot prove their ancestors settled in Myanmar before 1823, but can prove they have one grandparent, or pre-1823 ancestor, who was a citizen of another country, as well as people who applied for citizenship in 1948 and qualified then by those laws. Naturalized citizenship is only given to those who have at least one parent with one of these types of Burmese citizenship or can provide "conclusive evidence" that their parents entered and resided in Burma prior to independence in 1948. The Burmese regime has attempted to forcibly expel Rohingya and bring in non-Rohingyas to replace them—this policy has resulted in the expulsion of approximately half of the 800,000 Rohingya from Burma, while the Rohingya people have been described as "among the world's least wanted" and "one of the world's most persecuted minorities." But the origin of ‘most persecuted minority’ statement is unclear.

paragraph_text: NATO has added new members seven times since its founding in 1949, and since 2017 NATO has had 29 members. Twelve countries were part of the founding of NATO: Belgium, Canada, Denmark, France, Iceland, Italy, Luxembourg, the Netherlands, Norway, Portugal, the United Kingdom, and the United States. In 1952, Greece and Turkey became members of the Alliance, joined later by West Germany (in 1955) and Spain (in 1982). In 1990, with the reunification of Germany, NATO grew to include the former country of East Germany. Between 1994 and 1997, wider forums for regional cooperation between NATO and its neighbors were set up, including the Partnership for Peace, the Mediterranean Dialogue initiative and the Euro - Atlantic Partnership Council. In 1997, three former Warsaw Pact countries, Hungary, the Czech Republic, and Poland, were invited to join NATO. After this fourth enlargement in 1999, the Vilnius group of The Baltics and seven East European countries formed in May 2000 to cooperate and lobby for further NATO membership. Seven of these countries joined in the fifth enlargement in 2004. The Adriatic States Albania and Croatia joined in the sixth enlargement in 2009, Montenegro in 2017.

paragraph_text: Blueberry production -- 2014 Country (tonnes) United States 262,539 Canada 182,275 Mexico 18,031 Poland 12,469 Germany 12,077 France 9,200 World 525,620 Source: FAOSTAT of the United Nations

paragraph_text: One of the founding members, East Germany was allowed to re-arm by the Soviet Union and the National People's Army was established as the armed forces of the country to counter the rearmament of West Germany.

paragraph_text: Claudia Dreher (born 2 May 1971 in Magdeburg) is a female long-distance runner from Germany. She competed for her native country at the 2000 Summer Olympics in Sydney, Australia.

paragraph_text: Rolf Jähnichen joined the Christian Democratic Union (East Germany) in 1981. (Unlike its west German counterpart, the East German CDU, as part of the country's National Front alliance was effectively controlled by the country's ruling SED party.) Between 1984 and 1989 Jähnichen was a member of the local council in his hometown of , on the edge of Leipzig. Between 1989 and 1990 he was a member of the CDU party executive.

paragraph_text: Albano Carrisi (Italian: [alˈbaːno karˈriːzi]; born 20 May 1943), better known as Al Bano, is an Italian recording artist, actor, and winemaker. In 2016, he was awarded Albanian citizenship due to his close ties with the country.

paragraph_text: Pursuant to this power, Congress in 1790 passed the first naturalization law for the United States, the Naturalization Act of 1790. The law enabled those who had resided in the country for two years and had kept their current state of residence for a year to apply for citizenship. However it restricted naturalization to ``free white persons ''of`` good moral character''.

paragraph_text: Telman Mardanovich Ismailov (, ; born 26 October 1956) is an Azerbaijani-born businessman and entrepreneur of Mountain Jew origin. Since Azerbaijan does not allow dual citizenship, he holds Russian-Turkish citizenship. He is the chairman of the Russian AST Group of companies, which is active in many countries. Until 2009, Ismailov owned the Europe's then-largest marketplace, Cherkizovsky Market, located in Moscow, Russia.

paragraph_text: There are generally three possible arrangements by which a country can have a single border. The first is with a divided island such a Haiti and the Dominican Republic, or Ireland and the United Kingdom. The second is a peninsular relationship, where the first country borders the second and is otherwise surrounded by sea, while the second country borders other countries, as with Portugal and Spain, Denmark and Germany, or Canada and the United States. The third is the circumstance where the first country is a small country that is landlocked and completely surrounded by the second, larger country, as with The Vatican and Italy, or Lesotho and South Africa.

paragraph_text: Claudia Hürtgen (born 10 September 1971 in Aachen) is a German race driver. Along with Ellen Lohr and Sabine Schmitz, she is one of Germany's best known female racers.

paragraph_text: Claudia Österheld (born 8 December 1968 in Kassel) is a West Germany sprint canoer who competed in the late 1980s. At the 1988 Summer Olympics in Seoul, she finished fifth in the K-4 500 m event while being eliminated in the semifinals of the K-2 500 m event.

paragraph_text: The German reunification (German: Deutsche Wiedervereinigung) was the process in 1990 in which the German Democratic Republic (GDR / DDR / East Germany) joined the Federal Republic of Germany (FRG / West Germany) to form the reunited nation of Germany, and when Berlin reunited into a single city, as provided by its then Grundgesetz constitution Article 23. The end of the unification process is officially referred to as German unity (German: Deutsche Einheit), celebrated on 3 October (German Unity Day) (German: Tag der deutschen Einheit). Following German reunification, Berlin was once again designated as the capital of united Germany.

paragraph_text: Emma's Bliss is a 2006 romantic tragic-comedy that takes place in contemporary rural Germany. The movie, directed by Sven Taddicken, is based on the novel "Emmas Glück" (now translated into English under the title "Emma's Luck") by Claudia Schreiber.

paragraph_text: Errol Osbourne Nolan II (born August 18, 1991) is an American born sprinter of Jamaican descent who holds dual citizenship with both countries. He now competes for Jamaica as of 2012. He specialises in the 200 and 400 metres.

paragraph_text: Rank Athlete Nation Sport Sex Marit Bjørgen Norway Cross-country 8 15 Ole Einar Bjørndalen Norway Biathlon 8 13 Bjørn Dæhlie Norway Cross-country 8 0 12 Ireen Wüst Netherlands Speed skating 5 5 11 5 Raisa Smetanina Soviet Union Unified Team Cross-country 5 10 6 Stefania Belmondo Italy Cross-country 5 10 7 Lyubov Yegorova Unified Team Russia Cross-country 6 0 9 8 Claudia Pechstein Germany Speed skating 5 9 9 Sixten Jernberg Sweden Cross-country 9 10 Sven Kramer Netherlands Speed skating 9 11 Charlotte Kalla Sweden Cross-country 6 0 9 12 Uschi Disl Germany Biathlon 9 13 Viktor Ahn South Korea Russia Short track 6 0 8 14 Ricco Groß Germany Biathlon 8 Emil Hegle Svendsen Norway Biathlon 8 16 Galina Kulakova Soviet Union Cross-country 8 Kjetil André Aamodt Norway Alpine skiing 8 Sven Fischer Germany Biathlon 8 19 Karin Enke East Germany Speed skating 8 Gunda Niemann - Stirnemann Germany Speed skating 8 21 Apolo Anton Ohno United States Short track 8 22 Arianna Fontana Italy Short track 5 8

paragraph_text: On national team level West Germany played its first post-war international on 22 November 1950 against Switzerland in Stuttgart, while East Germany played their first game against Poland on 21 September 1952 in Warsaw and its 293rd and last on 12 September 1990 against Belgium in Brussels. The two sides met just once on senior national team level, on 22 June 1974, in a group game of the 1974 FIFA World Cup, held in West Germany. The game in Hamburg, in front of 62,000, was won 1 -- 0 by the guest team courtesy to a goal by Jürgen Sparwasser. East Germany finished the tournament in sixth place while West Germany won the FIFA World Cup. For the East it was the only participation while the West won the 1954 and 1990 editions as well. The two countries never met again at this level despite West Germany frequently requesting a rematch but the East declining, despite strong interest from East German players, coaches and fans. With the German reunification a special game between the two former countries was planned for 21 November 1990 in Leipzig but was cancelled after a fatal shooting of a supporter at a game between FC Sachsen Leipzig and FC Berlin by the police on 3 November. West and East Germany had been drawn against each other for the qualifying of the 1992 UEFA European Football Championship but the latter was withdrawn because of the German reunification.

Question: When did East Germany and Claudia Österheld's country of citizenship merge?
Answer: 1990