Question: Who was the spouse of the politician that adopted the policy of blood and iron?

full_context: Document 1: William I, German Emperor: William I, ( ; 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 18 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 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. In contrast to the domineering Bismarck, William was described as polite, gentlemanly and, while staunchly conservative, more open to certain classical liberal ideas than his grandson Wilhelm II.
Document 2: Territorial evolution of Germany: The territorial changes of Germany include all changes in the borders and territory of Germany from its formation in 1871 to the present. Modern Germany was formed in 1871 when Otto von Bismarck unified most of the German states, with the notable exception of Austria, into the German Empire. After the First World War, Germany lost about 10% of its territory to its neighbours and the Weimar Republic was formed. This republic included territories to the east of today's German borders.
Document 3: Blood and Iron (speech): Blood and Iron (German: Blut und Eisen) is the name given to a speech made by Otto von Bismarck given on 30 September 1862, at the time when he was Minister President of Prussia, about the unification of the German territories. It is also a transposed phrase that Bismarck uttered near the end of the speech that has become one of his most widely known quotations.
Document 4: Otto Christian Archibald von Bismarck: He was the eldest of the three sons of Herbert von Bismarck, as well as the grandson of the German chancellor Otto von Bismarck and elder brother of Gottfried Graf von Bismarck-Schönhausen. A lawyer, he became the owner of the family estate in Schönhausen and joined the diplomatic service in 1927, serving in Stockholm (1927–28), London (1928–37), with the Foreign Ministry in Berlin (1937–40), as Envoy to Rome (Kingdom of Italy) (1940–43), and finally as head of the Italian section of the Foreign Ministry (1943–44).
Document 5: Bismarck Monument (Bad Kissingen): The Bismarck Monument in Bad Kissingen is located in Hausen (a quarter of the German spa town, Bad Kissingen), which Chancellor Otto von Bismarck visited 14 times to "take the cure" between 1876 and 1893. The monument was built in 1877, during his lifetime. It was the first statue to be erected in Bismarck's honour.
Document 6: Herbert von Bismarck: Prince Nikolaus Heinrich Ferdinand Herbert von Bismarck (Born Nikolaus Heinrich Ferdinand Herbert von Bismarck-Schönhausen; 28 December 1849 – 18 September 1904) was a German politician, who served as Foreign Secretary from 1886 to 1890. His political career was closely tied to that of his father, Otto von Bismarck, and he left office a few days after his father's dismissal. He succeeded his father as the 2nd Prince of Bismarck in 1898. He was born in Berlin and died in Friedrichsruh.
Document 7: Bismarck monument: From 1868 onwards, Bismarck monuments were erected in many parts of the German Empire in honour of the long-serving Prussian minister-president and first German "Reichskanzler", Prince Otto von Bismarck. Today some of these monuments are on the soil of other countries including France, Poland and Russia as well as the former German colonies on other continents.
Document 8: Blood and Iron (speech): Blood and Iron (German: Blut und Eisen) is the title of a speech by Minister President of Prussia Otto von Bismarck given in 1862 about the unification of the German territories. It is also a transposed phrase that Bismarck uttered near the end of the speech that has become one of his most widely known quotations.
Document 9: Carinhall: Named in honour of his Swedish first wife, Carin Göring (1888–1931), the residence was constructed in stages from 1933 on a large scale, but in the manner of a hunting lodge. The main architect was Werner March, designer of the Olympic stadium in Berlin. Carin Göring's remains had first been interred in Sweden following her death, but were moved to Carinhall in 1934 and placed in a mausoleum on the grounds.
Document 10: Unification of Germany: Historians debate whether Otto von Bismarck -- Minister President of Prussia -- had a master plan to expand the North German Confederation of 1866 to include the remaining independent German states into a single entity or simply to expand the power of the Kingdom of Prussia. They conclude that factors in addition to the strength of Bismarck's Realpolitik led a collection of early modern polities to reorganize political, economic, military, and diplomatic relationships in the 19th century. Reaction to Danish and French nationalism provided foci for expressions of German unity. Military successes -- especially those of Prussia -- in three regional wars generated enthusiasm and pride that politicians could harness to promote unification. This experience echoed the memory of mutual accomplishment in the Napoleonic Wars, particularly in the War of Liberation of 1813 -- 14. By establishing a Germany without Austria, the political and administrative unification in 1871 at least temporarily solved the problem of dualism.
Document 11: Imperialism: Not a maritime power, and not a nation-state, as it would eventually become, Germany’s participation in Western imperialism was negligible until the late 19th century. The participation of Austria was primarily as a result of Habsburg control of the First Empire, the Spanish throne, and other royal houses.[further explanation needed] After the defeat of Napoleon, who caused the dissolution of that Holy Roman Empire, Prussia and the German states continued to stand aloof from imperialism, preferring to manipulate the European system through the Concert of Europe. After Prussia unified the other states into the second German Empire after the Franco-German War, its long-time Chancellor, Otto von Bismarck (1862–90), long opposed colonial acquisitions, arguing that the burden of obtaining, maintaining, and defending such possessions would outweigh any potential benefits. He felt that colonies did not pay for themselves, that the German bureaucratic system would not work well in the tropics and the diplomatic disputes over colonies would distract Germany from its central interest, Europe itself.
Document 12: Bismarck Mausoleum: The Bismarck Mausoleum is the mausoleum of Prince Otto von Bismarck and his wife Johanna von Puttkamer. It is on the Schneckenberg hill just outside Friedrichsruh in northern Germany. Bismarck was the first Chancellor of Germany (1871–1890). The chapel is now a protected monument.
Document 13: 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 18 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 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. In contrast 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 14: Unification of Germany: The unification of Germany into a politically and administratively integrated nation state officially occurred on 18 January 1871, in the Hall of Mirrors at the Palace of Versailles in France. Princes of the German states, excluding Austria, gathered there to proclaim Wilhelm I of Prussia as German Emperor after the French capitulation in the Franco - Prussian War. Unofficially, the de facto transition of most of the German - speaking populations into a federated organization of states had been developing for some time through alliances formal and informal between princely rulers -- but in fits and starts; self - interests of the various parties hampered the process over nearly a century of autocratic experimentation, beginning in the era of the Napoleonic Wars, which saw the dissolution of the Holy Roman Empire of the German Nation (1806), and the subsequent rise of German nationalism.
Document 15: German battleship Bismarck: Bismarck was the first of two s built for Nazi Germany's "Kriegsmarine". Named after Chancellor Otto von Bismarck, the ship was laid down at the Blohm & Voss shipyard in Hamburg in July 1936 and launched in February 1939. Work was completed in August 1940, when she was commissioned into the German fleet. "Bismarck" and her sister ship were the largest battleships ever built by Germany, and two of the largest built by any European power.
ground_truth: Johanna von Puttkamer
sub_queries: who adopted the policy of blood and iron Answer: Otto von Bismarck
Otto von Bismarck >> spouse Answer: Johanna von Puttkamer