Question: Otto Eduard Leopold, Prince of Bismarck's titled name, Otto von Bismarck, comes from Bismarck, in what district of Germany?

full_context: Document 1: Sachsenwald: The Sachsenwald is a forest near Hamburg, Germany. It is an unincorporated area in the amt Hohe Elbgeest. It derives its name (which means 'Saxon wood' in English) from being located in the former Duchy of Saxe-Lauenburg, earlier also called Lower Saxony, now mostly covered by the Herzogtum Lauenburg (Duchy of Lauenburg) district. The Sachsenwald has an area of 68 km. It was given to Otto von Bismarck in 1871 for his achievements for Germany.
Document 2: Royal palace of Werla: The Royal Palace of Werla (German: "Königspfalz Werla") is located near Werlaburgdorf (municipality: Schladen-Werla) in Lower Saxony. The grounds of the royal palace cover about 20 hectares rising atop Kreuzberg hill, a 17 m high natural plateau overlooking the Oker river. In the Early Middle Ages the palace was an important place in the Holy Roman Empire, serving as an important base for the Ottonians in the 10th century in particular. Although it subsequently lost its political significance to the newly established Imperial Palace of Goslar at Rammelsberg, it developed into an independent settlement with a busy industrial quarter. In the 14th century it fell into ruin and was completely unknown until its rediscovery in the 18th century. The core fortress in particular was thoroughly excavated in the 20th century. Excavations carried out since 2007 have brought new understanding to the hitherto largely unexplored outworks. Since 2010 the palace complex with foundation and enceinte, as well as earthworks, has been partially reconstructed and is now open to the public as the "Archäologie- und Landschaftspark Kaiserpfalz Werla" (Archaeological and Wilderness Park of the Imperial Palace of Werla).
Document 3: William I, German Emperor: William I, or in German Wilhelm I (full name: "William Frederick Louis of Hohenzollern", German: "Wilhelm Friedrich Ludwig von Hohenzollern" , 22 March 1797 – 9 March 1888), of the House of Hohenzollern was King of Prussia from 2 January 1861 and the first German Emperor from 1 January 1871 to his death, the first Head of State of a united Germany. Under the leadership of William and his Minister President Otto von Bismarck, Prussia achieved the unification of Germany and the establishment of the German Empire. Despite his long support of Otto von Bismarck as Minister President, William held strong reservations about some of Bismarck's more reactionary policies, including his anti-Catholicism and tough handling of subordinates. Contrary to the domineering Bismarck, William was described as polite, gentlemanly and, while a staunch conservative, more open to certain classical liberal ideas than his grandson Wilhelm II.
Document 4: Wettin, Saxony-Anhalt: Wettin is a small town and a former municipality in the Saalekreis district of Saxony-Anhalt, Germany, situated on the River Saale north of Halle. Since 1 January 2011, it is part of the town Löbejün-Wettin. It is known for Wettin Castle, the ancestral seat of the House of Wettin, ruling dynasty of Saxony and Poland. Wettin sights include the Tower of Bismarck, the town hall, and the castle (used as the Burggymnasium).
Document 5: Historical assessment of Klemens von Metternich: Prince Klemens von Metternich was a German-born Austrian politician and statesman and one of the most important diplomats of his era, serving as the Foreign Minister of the Holy Roman Empire and its successor state, the Austrian Empire, from 1809 until the liberal revolutions of 1848 forced his resignation. His influence on historical developments on Europe has been the subject a numerous assessments. Some of the subjects that has been assessed are Metternich's over-all diplomatic skills and actual degree of influence, his role in shaping the balance of power in Europe, his relation and influence on nationalist and liberal movements.
Document 6: State Palaces, Castles and Gardens of Saxony: The State Palaces, Castles and Gardens of Saxony (German: "Staatliche Schlösser, Burgen und Gärten Sachsen" ) is a state-owned company with its head office in Dresden. It belongs to the Saxon State Ministry of Finance and has the aim of preserving Saxon cultural heritage whilst respecting cultural and conservation needs. The state-owned company manages several palaces, castles and parks in the Saxony. These include the Zwinger in Dresden, the Albrechtsburg in Meissen and Kriebstein Castle.
Document 7: SMS Fürst Bismarck: SMS "Fürst Bismarck" ("Prince Bismarck") was Germany's first armored cruiser, built for the Kaiserliche Marine before the turn of the 20th century. The ship was named for the German statesman Otto von Bismarck. The design for "Fürst Bismarck" was an improvement over the previous "Victoria Louise"-class protected cruiser—"Fürst Bismarck" was significantly larger and better armed than her predecessors.
Document 8: Otto von Bismarck: Otto Eduard Leopold, Prince of Bismarck, Duke of Lauenburg (1 April 1815 – 30 July 1898), known as Otto von Bismarck (] ), was a conservative Prussian statesman who dominated German and European affairs from the 1860s until 1890. In the 1860s, he engineered a series of wars that unified the German states, deliberately excluding Austria, into a powerful German Empire under Prussian leadership. With that accomplished by 1871, he skillfully used balance of power diplomacy to maintain Germany's position in a Europe which, despite many disputes and war scares, remained at peace. For historian Eric Hobsbawm, it was Bismarck who "remained undisputed world champion at the game of multilateral diplomatic chess for almost twenty years after 1871, [and] devoted himself exclusively, and successfully, to maintaining peace between the powers". However, his annexation of Alsace-Lorraine gave new fuel to French nationalism and promoted Germanophobia in France. This helped set the stage for the First World War.
Document 9: Altes Schloss (Bad Berneck): The Altes Schloss ("Old Castle") near Bad Berneck in south Germany is a ruined castle built in the Gothic style as an "Amtsburg" towards the end of the High Middle Ages. The castle lies on the "Schlossberg" ("castle hill") of Bad Berneck in the Upper Franconian district of Bayreuth in Bavaria. Today the lofty keep is the emblem of this small spa town.
Document 10: List of foreign ministers of Prussia: This page lists Foreign Ministers of Prussia. See also Foreign Minister of Germany, Foreign Minister of Bavaria and Minister President of Prussia. After the creation of the German Empire in 1871, the Imperial Chancellor was normally also Foreign Minister of Prussia. However, during the chancellorship of Prince Hohenlohe (1894–1900), the position was held by the State Secretaries for Foreign Affairs.
Document 11: House of Bismarck: The House of Bismarck is a German noble family that rose to prominence in the 19th-century, largely through the achievements of the statesman Otto von Bismarck. He was granted the hereditary title of Prince of Bismarck in 1871, a hereditary comital title in 1865 and a ducal title, Duke of Lauenburg, held only for his own lifetime. Several of Otto's descendants, notably his son Herbert, Prince of Bismarck, were also politicians.
Document 12: Fürst von Bismarck: The great German statesman and diplomat Otto von Bismarck (1815–1898) received several noble titles during the course of his career. Already born into a noble Junker family, the House of Bismarck, he began life as simply "Mr (German:"Herr") Otto Eduard Leopold von Bismarck".
Document 13: Saxe-Coburg and Gotha: Saxe-Coburg and Gotha (German: "Sachsen-Coburg und Gotha" ), or Saxe-Coburg-Gotha, was an Ernestine duchy ruled by a branch of the House of Wettin, consisting of territories in the present-day states of Bavaria and Thuringia in Germany. It lasted from 1826 to 1918.
Document 14: Celle: Celle (] ) is a town and capital of the district of Celle, in Lower Saxony, Germany. The town is situated on the banks of the River Aller, a tributary of the Weser and has a population of about 71,000. Celle is the southern gateway to the Lüneburg Heath, has a castle ("Schloss Celle") built in the renaissance and baroque style and a picturesque old town centre (the "Altstadt") with over 400 timber-framed houses, making Celle one of the most remarkable members of the German Timber-Frame Road. From 1378 to 1705, Celle was the official residence of the Lüneburg branch of the dukes of Brunswick-Lüneburg (House of Welf) who had been banished from their original ducal seat by its townsfolk.
Document 15: League of the Three Emperors: The Three Caesars' Alliance or League of the Three Emperors (German: "Dreikaiserabkommen" , Russian: Союз трёх императоров ) was an alliance between the German Empire, the Russian Empire and Austria-Hungary, from 1873 to 1887. Chancellor Otto von Bismarck took full charge of German foreign policy from 1870 to his dismissal in 1890. His goal was a peaceful Europe, based on the balance of power. Bismarck feared that a hostile combination of Austria, France and Russia would crush Germany. If two of them were allied, then the third would ally with Germany only if Germany conceded excessive demands. The solution was to ally with two of the three. In 1873 he formed the League of the Three Emperors, an alliance of the Kaiser of Germany, the Tsar of Russia, and the Kaiser of Austria-Hungary. Together they would control Eastern Europe, making sure that restive ethnic groups such as the Poles were kept in control. It aimed at neutralizing the rivalry between Germany’s two neighbors by an agreement over their respective spheres of influence in the Balkans and at isolating Germany’s enemy, France. The Balkans posed a more serious issue, and Bismarck's solution was to give Austria predominance in the western areas, and Russia in the eastern areas.
ground_truth: Saalekreis