Question: What Columbia President went to the university where the Isokon Long Chair developer was employed?

full_context: Document 1: Harvard University: Established originally by the Massachusetts legislature and soon thereafter named for John Harvard (its first benefactor), Harvard is the United States' oldest institution of higher learning, and the Harvard Corporation (formally, the President and Fellows of Harvard College) is its first chartered corporation. Although never formally affiliated with any denomination, the early College primarily trained Congregationalist and Unitarian clergy. Its curriculum and student body were gradually secularized during the 18th century, and by the 19th century Harvard had emerged as the central cultural establishment among Boston elites. Following the American Civil War, President Charles W. Eliot's long tenure (1869–1909) transformed the college and affiliated professional schools into a modern research university; Harvard was a founding member of the Association of American Universities in 1900. James Bryant Conant led the university through the Great Depression and World War II and began to reform the curriculum and liberalize admissions after the war. The undergraduate college became coeducational after its 1977 merger with Radcliffe College.
Document 2: Hermann Muthesius: Adam Gottlieb Hermann Muthesius (20 April 1861 – 29 October 1927), known as Hermann Muthesius, was a German architect, author and diplomat, perhaps best known for promoting many of the ideas of the English Arts and Crafts movement within Germany and for his subsequent influence on early pioneers of German architectural modernism such as the Bauhaus.
Document 3: Historical rankings of presidents of the United States: According to a Rasmussen poll conducted in 2007, six presidents -- George Washington, Abraham Lincoln, Thomas Jefferson, Theodore Roosevelt, Franklin D. Roosevelt, and John F. Kennedy -- were rated favorably by at least 80% of Americans.
Document 4: Wassily Chair: The Wassily Chair, also known as the Model B3 chair, was designed by Marcel Breuer in 1925-1926 while he was the head of the cabinet-making workshop at the Bauhaus, in Dessau, Germany.
Document 5: Michael McCoy: Michael McCoy graduated from Michigan State University with a degree in Industrial Design. During his career as an Industrial Designer, McCoy has worked with corporations such as Philips Electronics, Formica Corporation, NEC, Steelcase among many. As a designer, McCoy is best known for his work with furniture manufacturer Knoll International. Along with Dale Fahnstrom, Fahnstrom/McCoy Design Consultants designed the 5 time award-winning Bulldog chair. The Bulldog is Knoll’s best selling office chair to date.
Document 6: Yale University: In 2009, former British Prime Minister Tony Blair picked Yale as one location – the others are Britain's Durham University and Universiti Teknologi Mara – for the Tony Blair Faith Foundation's United States Faith and Globalization Initiative. As of 2009, former Mexican President Ernesto Zedillo is the director of the Yale Center for the Study of Globalization and teaches an undergraduate seminar, "Debating Globalization". As of 2009, former presidential candidate and DNC chair Howard Dean teaches a residential college seminar, "Understanding Politics and Politicians." Also in 2009, an alliance was formed among Yale, University College London, and both schools’ affiliated hospital complexes to conduct research focused on the direct improvement of patient care—a growing field known as translational medicine. President Richard Levin noted that Yale has hundreds of other partnerships across the world, but "no existing collaboration matches the scale of the new partnership with UCL".
Document 7: Stillman House: Stillman House (1950) follows Marcel Breuer’s Gregory Ain demonstration “House in the Garden” built the year before for the MOMA Museum, which now sits at the Rockefeller Kykuit estate in Hudson Valley, NY. The Stillman house boasts three separate architectural commissions by Breuer between 1950-1953: a main house, a studio, and pool and porch redesign, with the latter featuring an 18’x10’ pool mural wall by friend and sculptor, Alexander Calder. During this time, fellow first-generation Bauhaus friend and artist, Xanti Schawinsky, executed an interior mural wall as well.
Document 8: Harvard University: Other: Civil rights leader W. E. B. Du Bois; philosopher Henry David Thoreau; authors Ralph Waldo Emerson and William S. Burroughs; educators Werner Baer, Harlan Hanson; poets Wallace Stevens, T. S. Eliot and E. E. Cummings; conductor Leonard Bernstein; cellist Yo Yo Ma; pianist and composer Charlie Albright; composer John Alden Carpenter; comedian, television show host and writer Conan O'Brien; actors Tatyana Ali, Nestor Carbonell, Matt Damon, Fred Gwynne, Hill Harper, Rashida Jones, Tommy Lee Jones, Ashley Judd, Jack Lemmon, Natalie Portman, Mira Sorvino, Elisabeth Shue, and Scottie Thompson; film directors Darren Aronofsky, Terrence Malick, Mira Nair, and Whit Stillman; architect Philip Johnson; musicians Rivers Cuomo, Tom Morello, and Gram Parsons; musician, producer and composer Ryan Leslie; serial killer Ted Kaczynski; programmer and activist Richard Stallman; NFL quarterback Ryan Fitzpatrick; NFL center Matt Birk; NBA player Jeremy Lin; US Ski Team skier Ryan Max Riley; physician Sachin H. Jain; physicist J. Robert Oppenheimer; computer pioneer and inventor An Wang; Tibetologist George de Roerich; and Marshall Admiral Isoroku Yamamoto.
Document 9: Harvard Five: They were all influenced by Walter Gropius, who founded the Bauhaus in 1919, and thereafter became head of the architecture program at Harvard.
Document 10: Barcelona chair: The Barcelona chair is a chair designed by Ludwig Mies van der Rohe and Lilly Reich. It was originally designed for the German Pavilion, that country's entry for the International Exposition of 1929, which was hosted by Barcelona, Catalonia, Spain. It was first used in Villa Tugendhat, a World Heritage Site designed by Mies van der Rohe in the city of Brno (Czech Republic).
Document 11: University of Chicago: Notable alumni in the field of government and politics include the founder of modern community organizing Saul Alinsky, Obama campaign advisor and top political advisor to President Bill Clinton David Axelrod, Attorney General and federal judge Robert Bork, Attorney General Ramsey Clark, Prohibition agent Eliot Ness, Supreme Court Justice John Paul Stevens, Prime Minister of Canada William Lyon Mackenzie King, 11th Prime Minister of Poland Marek Belka, Governor of the Bank of Japan Masaaki Shirakawa, the first female African-American Senator Carol Moseley Braun, United States Senator from Vermont and 2016 Democratic Presidential Candidate Bernie Sanders, and former World Bank President Paul Wolfowitz.
Document 12: Chair (sculpture): Chair is a public artwork designed as an advertisement by Bassett Furniture, located at the intersection of Martin Luther King Ave. and V. Street S.E., in the Anacostia neighborhood of Washington, D.C., United States of America. "Chair" was originally surveyed as part of the Smithsonian's Save Outdoor Sculpture! survey in 1994. It was once considered the world's largest chair, but has been overtaken by works like "Broken Chair" in Geneva and the temporary "The Writer" on Hampstead Heath in London.
Document 13: Harvard University: Politics: U.N. Secretary General Ban Ki-moon; American political leaders John Hancock, John Adams, John Quincy Adams, Rutherford B. Hayes, Theodore Roosevelt, Franklin D. Roosevelt, John F. Kennedy, Al Gore, George W. Bush and Barack Obama; Chilean President Sebastián Piñera; Colombian President Juan Manuel Santos; Costa Rican President José María Figueres; Mexican Presidents Felipe Calderón, Carlos Salinas de Gortari and Miguel de la Madrid; Mongolian President Tsakhiagiin Elbegdorj; Peruvian President Alejandro Toledo; Taiwanese President Ma Ying-jeou; Canadian Governor General David Lloyd Johnston; Indian Member of Parliament Jayant Sinha; Albanian Prime Minister Fan S. Noli; Canadian Prime Ministers Mackenzie King and Pierre Trudeau; Greek Prime Minister Antonis Samaras; Israeli Prime Minister Benjamin Netanyahu; former Pakistani Prime Minister Benazir Bhutto; U. S. Secretary of Housing and Urban Development Shaun Donovan; Canadian political leader Michael Ignatieff; Pakistani Members of Provincial Assembly Murtaza Bhutto and Sanam Bhutto; Bangladesh Minister of Finance Abul Maal Abdul Muhith; President of Puntland Abdiweli Mohamed Ali; U.S. Ambassador to the European Union Anthony Luzzatto Gardner.
Document 14: Caribbean and Central America Action: Among the public figures speaking at the 33rd conference, held in 2009 in Miami, were the Prime Minister of Haiti, Jean-Max Bellerive, Canada's Minister of State of Foreign Affairs, Peter Kent and Puerto Rico's Secretary of State, Kenneth McClintock. The organization's policy-oriented programs have focused on tourism, financial services, policy and regulatory environments for business in the Americas, energy security, maritime port security, disaster mitigation, customs, telecommunications, intellectual property rights, information technology, agriculture and telecommunications. Cabinet-level officials have represented the United States at prior conferences.
Document 15: Isokon Long Chair: The Isokon Long Chair is a chair designed by Marcel Breuer for the Isokon company in 1935-36. The chair is considered one of the most important pieces of furniture to emerge from the inter-war modern movement and it is in the permanent collections of several internationally renowned museums including the Victoria and Albert Museum.
ground_truth: Juan Manuel Santos
sub_queries: Who developed Isokon Long Chair? Answer: Marcel Breuer
Marcel Breuer >> employer Answer: Harvard
What Columbia President went to Harvard ? Answer: Juan Manuel Santos