Question: What is the main research library at the place where Torben Grodal is employed?

full_context: Document 1: Uppsala University Library: The Uppsala University Library () at Uppsala University in Uppsala, Sweden, consists of 11 subject libraries, one of which is housed in the old main library building, Carolina Rediviva. The library holds books and periodicals, manuscripts, musical scores, pictures and maps.
Document 2: Copenhagen University Library: The Copenhagen University Library (Danish: Københavns Universitetsbibliotek) in Copenhagen, Denmark, is the main research library of the University of Copenhagen. Founded in 1482, it is the oldest library in Denmark.
Document 3: Caspar Bartholin the Elder: Caspar Bartholin the Elder (; 12 February 1585 – 13 July 1629) was born at Malmø, Denmark (modern Sweden) and was a polymath, finally accepting a professorship in medicine at the University of Copenhagen, Denmark, in 1613. He later taught theology at the same university.
Document 4: Haldun Taner: He was born on March 16, 1915 in Istanbul. After graduating from the Galatasaray High School in 1935, he studied politics and economy at the University of Heidelberg in Germany, until a serious health problem forced him to return to Turkey, where he graduated from the Faculty of German Literature and Linguistics in 1950. He also studied theatre and philosophy at the University of Vienna between 1955 and 1957 under the direction of Heinz Kindermann (1894–1985), an Austrian theater and literary scholar.
Document 5: Paris: There are several academic libraries and archives in Paris. The Sorbonne Library in the 5th arrondissement is the largest university library in Paris. In addition to the Sorbonne location, there are branches in Malesherbes, Clignancourt-Championnet, Michelet-Institut d'Art et d'Archéologie, Serpente-Maison de la Recherche, and Institut des Etudes Ibériques. Other academic libraries include Interuniversity Pharmaceutical Library, Leonardo da Vinci University Library, Paris School of Mines Library, and the René Descartes University Library.
Document 6: Torben Bernhard: Torben Bernhard (born March 5, 1983) is an American documentary filmmaker and rap artist originally from Kalamazoo, Michigan, and currently residing in Orem, Utah. Bernhard has written and directed documentary films and has additionally worked as a producer and cinematographer. He is part of the OHO Media film collective with his wife Marissa Bernhard and frequent collaborator Travis Low.
Document 7: Christian Heinrich Grosch: Christian Heinrich Grosch was born in Copenhagen, Denmark. His family moved to Frederikshald (now Halden) in Østfold, Norway during 1811. He was first educated by his father, Heinrich August Grosch (1763-1843) who was a painter, graphic designer and teacher. When The Royal Drawing School was established in Christiania (now Oslo) in 1818, his father gained employment there as an instructor and re-located the family. Christian Heinrich attended the Royal Drawing School from 1819 to 1820. He also studied engineering with instructors including Benoni Aubert and Theodor Broch. In 1824, he completed his training at the Royal Danish Academy of Fine Arts in Copenhagen.
Document 8: Birgit Grodal: Birgit Grodal (24 June 1943 - 4 May 2004), was an economics professor at the University of Copenhagen from 1968 until her death in 2004.
Document 9: Colin Groves: Born in England, Groves completed a Bachelor of Science at University College London in 1963, and a Doctor of Philosophy at the Royal Free Hospital School of Medicine in 1966. From 1966 to 1973, he was a Postdoctoral Researcher and Teaching Fellow at the University of California, Berkeley, Queen Elizabeth College and the University of Cambridge. He emigrated to Australia in 1973 and joined the Australian National University, where he was promoted to full Professor in 2000 and remained Emeritus Professor until his death.
Document 10: Vilnius University Library: Vilnius University Library or VU Library (also VUL) is the oldest and one of the largest academic libraries of Lithuania. It was founded in 1570 by the Jesuits and as such is nine years older than Vilnius University. VU Library holds 5.4 million documents on shelves measuring 166 kilometres (103 mi) in length. The holdings, accessible to members of the university and wider public, include some of the oldest manuscripts, incunabula and engravings in Lithuania and Eastern Europe. At present the library has 36 thousand users.
Document 11: Göran Therborn: Göran Therborn FAcSS (23 September 1941, Kalmar, Sweden) is a professor of sociology at Cambridge University and is amongst the most highly cited contemporary Marxian-influenced sociologists. He has published widely in journals such as the "New Left Review", and is notable for his writing on topics that fall within the general political and sociological framework of post-Marxism. Topics on which he has written extensively include the intersection between the class structure of society and the function of the state apparatus, the formation of ideology within subjects, and the future of the Marxist tradition.
Document 12: Harvard University: The Harvard University Library System is centered in Widener Library in Harvard Yard and comprises nearly 80 individual libraries holding over 18 million volumes. According to the American Library Association, this makes it the largest academic library in the United States, and one of the largest in the world. Cabot Science Library, Lamont Library, and Widener Library are three of the most popular libraries for undergraduates to use, with easy access and central locations. There are rare books, manuscripts and other special collections throughout Harvard's libraries; Houghton Library, the Arthur and Elizabeth Schlesinger Library on the History of Women in America, and the Harvard University Archives consist principally of rare and unique materials. America's oldest collection of maps, gazetteers, and atlases both old and new is stored in Pusey Library and open to the public. The largest collection of East-Asian language material outside of East Asia is held in the Harvard-Yenching Library.
Document 13: University of Colombo library: University of Colombo library is a centrally administered network of libraries in University of Colombo, Sri Lanka. It is home to one of the largest and oldest collections in Sri Lanka, with its roots dating back to 1870 with the establishment of the library of the Ceylon Medical College.
Document 14: Torben Grodal: Torben Grodal is an author and professor emeritus of Film and Media studies at the University of Copenhagen in Denmark. Grodal was born on 25 January 1943 in Holbæk, Denmark.
Document 15: Black Diamond (library): The Black Diamond (Danish: Den Sorte Diamant) is a modern waterfront extension to the Royal Danish Library's old building on Slotsholmen in central Copenhagen, Denmark. Its quasi-official nickname is a reference to its polished black granite cladding and irregular angles. Designed by Danish architects Schmidt Hammer Lassen, the Black Diamond was completed in 1999 as the first in a series of large-scale cultural buildings along Copenhagen's waterfront.
ground_truth: Copenhagen University Library
sub_queries: What is Torben Grodal's place of employment? Answer: University of Copenhagen
University of Copenhagen >> has part Answer: Copenhagen University Library