Question: In 1971, who was the president of the nation that the U.S. beat in The Miracle on Ice?

full_context: Document 1: Viktoria Brezhneva: Viktoria Petrovna Brezhneva (; 11 December 1908 – 5 July 1995) was the wife of Soviet politician and longtime General Secretary Leonid Brezhnev. She was the mother of Yuri Brezhnev and Galina Brezhneva.
Document 2: List of leaders of the Soviet Union: Under the 1977 Constitution of the Union of Soviet Socialist Republics (USSR), the Chairman of the Council of Ministers was the head of government and the Chairman of the Presidium of the Supreme Soviet was the head of state. The office of the Chairman of the Council of Ministers was comparable to a prime minister in the First World, whereas the office of the Chairman of the Presidium was comparable to a president in the First World. In the Soviet Union's seventy - year history there was no official leader of the Soviet Union office, but during most of that era there was a de facto top leader who usually led the country through the office of the Premier or the office of the General Secretary of the Communist Party of the Soviet Union (CPSU). In the ideology of Vladimir Lenin the head of the Soviet state was a collegiate body of the vanguard party (see What Is to Be Done?).
Document 3: List of leaders of the Soviet Union: Leonid Brezhnev (1906 -- 1982) 14 October 1964 ↓ 10 November 1982 † 23rd -- 26th Congress Served as First Secretary of the Central Committee of the Communist Party, was later renamed General Secretary, and was co-equal with premier Alexei Kosygin until the 1970s. To consolidate his power he later assumed the title of Chairman of the Presidium.
Document 4: Dissolution of the Soviet Union: Mikhail Gorbachev was elected General Secretary by the Politburo on March 11, 1985, three hours after predecessor Konstantin Chernenko's death at age 73. Gorbachev, aged 54, was the youngest member of the Politburo. His initial goal as general secretary was to revive the Soviet economy, and he realized that doing so would require reforming underlying political and social structures. The reforms began with personnel changes of senior Brezhnev-era officials who would impede political and economic change. On April 23, 1985, Gorbachev brought two protégés, Yegor Ligachev and Nikolai Ryzhkov, into the Politburo as full members. He kept the "power" ministries happy by promoting KGB Head Viktor Chebrikov from candidate to full member and appointing Minister of Defence Marshal Sergei Sokolov as a Politburo candidate.
Document 5: United States men's national ice hockey team: The United States won gold medals at the 1960 and 1980 Winter Olympics and more recently, silver medals at the 2002 and 2010 Winter Olympics. The United States won the 1996 World Cup of Hockey. The team's most recent medal at the World Championships came with a bronze in 2015. They won the tournament in 1933 and 1960. Unlike other nations, the United States does n't typically use its best NHL players in the World Championships even when they're available. Instead, USA Hockey uses this tournament as a platform for young NHLers and college players.
Document 6: Miracle on Ice: Miracle on Ice Total Soviet Union 0 United States 0 Date February 22, 1980 Arena Olympic Center City Lake Placid, New York, U.S. Attendance 8,500
Document 7: Herb Brooks: Herbert Paul Brooks Jr. (August 5, 1937 -- August 11, 2003) was an American ice hockey player and coach. His most notable achievement came in 1980 as head coach of the gold medal - winning U.S. Olympic hockey team at Lake Placid. At the games, Brooks' US team upset the heavily favored Soviet team in a match that came to be known as the 'Miracle on Ice'. Brooks would go on to coach multiple NHL teams, as well as the French hockey team at the 1998 Winter Olympics, and ultimately returned to coach the US men's team to a silver medal at the 2002 games in Salt Lake City. Brooks was killed in a 2003 car accident. At the time of his death, Brooks was the Pittsburgh Penguins' director of player personnel.
Document 8: Miracle on Ice: For the first game in the medal round, the United States played the Soviets. Finishing the first period tied at 2 -- 2, and the Soviets leading 3 -- 2 following the second, the U.S. team scored two more goals to take their first lead during the third and final period, winning the game 4 -- 3 in a major upset against the Cold War rival. Following the game, the U.S. went on to clinch the gold medal by beating Finland in their final match of the tournament. Likewise, the Soviet Union took the silver medal by beating Sweden.
Document 9: Ice hockey at the 2014 Winter Olympics – Women's tournament: For the first time, the women's gold medal game was decided in overtime, with Canada defeating the United States 3 -- 2. Switzerland defeated Sweden for their first Olympic ice hockey medal in 66 years, and first ever medal in the women's tournament. With the win, the Canadian women's national ice hockey team won its fourth consecutive gold medal, a feat only previously accomplished by the Soviet Union men's team in 1964 -- 76, and the Canadian men's team in 1920 -- 32.
Document 10: Dissolution of the Soviet Union: In the fall of 1985, Gorbachev continued to bring younger and more energetic men into government. On September 27, Nikolai Ryzhkov replaced 79-year-old Nikolai Tikhonov as Chairman of the Council of Ministers, effectively the Soviet prime minister, and on October 14, Nikolai Talyzin replaced Nikolai Baibakov as chairman of the State Planning Committee (GOSPLAN). At the next Central Committee meeting on October 15, Tikhonov retired from the Politburo and Talyzin became a candidate. Finally, on December 23, 1985, Gorbachev appointed Yeltsin First Secretary of the Moscow Communist Party replacing Viktor Grishin.
Document 11: Nikita Khrushchev: Nikita Sergeyevich Khrushchev (15 April (O.S. 3 April) 1894 -- 11 September 1971) was a Soviet politician who led the Soviet Union during part of the Cold War as the First Secretary of the Communist Party of the Soviet Union from 1953 to 1964, and as Chairman of the Council of Ministers, or Premier, from 1958 to 1964. Khrushchev was responsible for the de-Stalinization of the Soviet Union, for backing the progress of the early Soviet space program, and for several relatively liberal reforms in areas of domestic policy. Khrushchev's party colleagues removed him from power in 1964, replacing him with Leonid Brezhnev as First Secretary and Alexei Kosygin as Premier.
Document 12: Curt Chaplin: Chaplin provided a version of audio play-by-play for one of the most famous moments in American sports history—the Miracle on Ice hockey game during the 1980 Winter Olympics at Lake Placid, New York. The underdog United States national team defeated the Soviet Union national team 4-3 in the semifinal round, beating a team that had won six of the previous seven Olympic gold medals. Chaplin, in an interview, notes that he was assigned to cover the game as a sports reporter for ABC News Radio, not a play-by-play announcer. However, he thought the game might be significant and found a spot near a TV camera to stand and narrate the game into his cassette recorder. His call of the game is now part of an exhibit about the game at the Hockey Hall of Fame.
Document 13: Ice hockey at the 1980 Winter Olympics: The men's ice hockey tournament at the 1980 Winter Olympics in Lake Placid, U.S.A., was the 14th Olympic Championship. Twelve teams competed in the tournament, which was held from February 12 to 24. The United States won its second gold medal, including a win over the heavily favored Soviet Union that became known as the ``Miracle on Ice ''. Games were held at the Olympic Arena and the Olympic Fieldhouse.
Document 14: Russian Soviet Federative Socialist Republic: In 1964, Nikita Khrushchev was removed from his position of power and replaced with Leonid Brezhnev. Under his rule, the Russian SFSR and the rest of the Soviet Union went through an era of stagnation. Even after he died in 1982, the era didn’t end until Mikhail Gorbachev took power and introduced liberal reforms in Soviet society.
Document 15: Miracle on Ice: The ``Miracle on Ice ''refers to a medal - round game during the men's ice hockey tournament at the 1980 Winter Olympics in Lake Placid, New York, played between the hosting United States, and the four - time defending gold medalists, the Soviet Union.
ground_truth: Leonid Brezhnev
sub_queries: who did the us beat in the miracle on ice Answer: the Soviet Union
who was the president of the Soviet Union in 1971 Answer: Leonid Brezhnev