Information:  - Duisburg is a German city in the western part of the Ruhr Area ("Ruhrgebiet") in North Rhine-Westphalia. It is an independent metropolitan borough within Regierungsbezirk Düsseldorf. With the world's biggest inland harbor and its proximity to Düsseldorf Airport, Duisburg has become an important venue for commerce and steel production. In the early Middle Ages it was a royal court of the Franks, first mentioned in writing in 883.  - West Germany is the common English name for the Federal Republic of Germany or FRG (or "RFA") in the period between its creation on 23 May 1949 to German reunification on 3 October 1990. During this Cold War era, NATO-aligned West Germany and Warsaw Pact-aligned East Germany were divided by the Inner German border. After 1961 West Berlin was physically separated from East Berlin as well as from East Germany by the Berlin Wall. This situation ended when East Germany was dissolved and its five states joined the ten states of the Federal Republic of Germany along with the reunified city-state of Berlin. With the reunification of West and East Germany, the Federal Republic of Germany, enlarged now to sixteen states, became known simply as "Germany". This period is also referred to as the Bonn Republic ("Bonner Republik") by historians, alluding to the interwar Weimar Republic and the post-reunification Berlin Republic.  - The Franks (or ') are historically first known as a group of Germanic tribes that inhabited the land between the Lower and Middle Rhine in the 3rd century AD, and second as the people of Gaul who merged with the Gallo-Roman populations during succeeding centuries, passing on their name to modern-day France and becoming part of the heritage of the modern French people. Some Franks raided Roman territory, while other Frankish tribes joined the Roman troops of Gaul. In later times, Franks became the military rulers of the northern part of Roman Gaul. With the coronation of their ruler Charlemagne as ' by Pope Leo III in 800 AD, he and his successors were recognised as legitimate successors to the emperors of the Western Roman Empire.  - The 1987 ICF Canoe Sprint World Championships were held in Duisburg, West Germany for the second time. The West German city hosted the championships previously in 1979.  - Düsseldorf Airport (until March 2013 "Düsseldorf International Airport") is the international airport of Düsseldorf, the capital of the German state North Rhine-Westphalia. It is located approximately north of downtown Düsseldorf, and some south-west of Essen in the Rhine-Ruhr area, Germany's largest metropolitan area.  - Düsseldorf (Low Franconian, Ripuarian: "Düsseldörp" ) is the capital city of the German state of North Rhine-Westphalia and the seventh most populous city in Germany. Düsseldorf is an international business and financial centre, renowned for its fashion and trade fairs. The city is headquarters to one Fortune Global 500 and two DAX companies. Messe Düsseldorf organises nearly one fifth of premier trade shows.  - North Rhine-Westphalia (, commonly shortened to NRW) is the most populous state of Germany, with a population of approximately 18 million, and the fourth largest by area. Its capital is Düsseldorf; the most populous city is Cologne. Four of Germany's ten largest citiesCologne, Düsseldorf, Dortmund, and Essenare located within the state, as well as the largest metropolitan area on the European continent, Rhine-Ruhr.  - The Rhine (, , ) is a European river that begins in the Swiss canton of Graubünden in the southeastern Swiss Alps, forms part of the  Swiss-Austrian, Swiss-Liechtenstein, Swiss-German and then the Franco-German border, then flows through the Rhineland and eventually empties into the North Sea in the Netherlands.  The largest city on the river Rhine is Cologne, Germany, with a population of more than 1,050,000 people. It is the second-longest river in Central and Western Europe (after the Danube), at about , with an average discharge of about .  - Ines Rudolph is an East German sprint canoer who competed in the late 1980s . She won a gold medal in the K - 4 500 m event at the 1987 ICF Canoe Sprint World Championships in Duisburg .    After reading the paragraphs above, we are interested in knowing the entity with which 'ines rudolph' exhibits the relationship of 'country of citizenship'. Find the answer from the choices below.  Choices: - east germany  - france  - gaul  - germany  - liechtenstein  - netherlands  - west germany
Answer:
east germany