Question: Which University is a private Ivy League university, University of Delaware or Columbia University?

full_context: Document 1: Rutgers University: Rutgers, The State University of New Jersey ( ), commonly referred to as Rutgers University, Rutgers, or RU, is an American public research university and the largest institution for higher education in New Jersey.
Document 2: Ivy League: The Ivy League is a collegiate athletic conference comprising sports teams from eight private institutions of higher education in the Northeastern United States. The conference name is also commonly used to refer to those eight schools as a group beyond the sports context. The eight institutions are Brown University, Columbia University, Cornell University, Dartmouth College, Harvard University, the University of Pennsylvania, Princeton University, and Yale University. The term "Ivy League" has connotations of academic excellence, selectivity in admissions, and social elitism.
Document 3: Columbia University: Columbia University (Columbia; officially Columbia University in the City of New York), established in 1754, is a private Ivy League research university in Upper Manhattan, New York City, often cited as one of the world's most prestigious universities.
Document 4: Harvard University: Harvard University is a private Ivy League research university in Cambridge, Massachusetts, established in 1636, whose history, influence, and wealth have made it one of the world's most prestigious universities.
Document 5: University of Delaware: The University of Delaware (colloquially "UD") is the largest university in Delaware. The main campus is in Newark, with satellite campuses in Dover, Wilmington, Lewes, and Georgetown. It is considered a large institution with approximately 18,500 undergraduate and 4,500 graduate students. UD is a privately governed university which receives public funding for being a land-grant, sea-grant, space-grant and urban-grant state-supported research institution.
Document 6: Cornell Law School: Cornell Law School is the law school of Cornell University, a private Ivy League university located in Ithaca, New York. It is one of the five Ivy League law schools and offers three law degree programs (J.D., LL.M., and J.S.D.) along with several dual-degree programs in conjunction with other professional schools at the university. Established in 1887 as Cornell's Department of Law, the law school is ranked 13th in the United States by U.S. News & World Report.
Document 7: Yale University: Yale University is an American private Ivy League research university in New Haven, Connecticut. Founded in 1701, it is the third-oldest institution of higher education in the United States and one of the nine Colonial Colleges chartered before the American Revolution.
Document 8: Cornell University: Cornell University ( ) is a private and statutory Ivy League research university located in Ithaca, New York. Founded in 1865 by Ezra Cornell and Andrew Dickson White, the university was intended to teach and make contributions in all fields of knowledge—from the classics to the sciences, and from the theoretical to the applied. These ideals, unconventional for the time, are captured in Cornell's motto, a popular 1865 Ezra Cornell quotation: "I would found an institution where any person can find instruction in any study."
Document 9: List of Drexel University alumni: Drexel University is a private university located in Philadelphia, Pennsylvania, United States. The 16th largest private university in the nation, Drexel is made up of nine colleges and four schools, most of which serve both undergraduate and graduate students. It offers 96 undergraduate degree programs, 88 master's programs, and 35 doctoral programs. Drexel was founded as a technical school in 1891 for the "improvement of industrial education as a means of opening better and wider avenues of employment to young men and women." Drexel began awarding undergraduate degrees in 1914, starting with the Bachelor of Science in engineering; before that, Drexel granted certificates or diplomas in the field of enrollment. In 1931, Drexel began offering graduate degrees through the School of Home Economics.
Document 10: University of Delhi: The University of Delhi (UOD), informally known as Delhi University (DU), is a collegiate public central university, located in New Delhi, India. It was founded in 1922 by an Act of the Central Legislative Assembly. As a collegiate university, its main functions are divided between the academic departments of the university and affiliated colleges. Consisting of three colleges, two faculties, and 750 students at its founding, the University of Delhi has since become India's largest institution of higher learning and among the largest in the world. The university currently consists of 16 faculties and 86 departments distributed across its North and South campuses. It has 77 affiliated colleges and 5 other institutes with an enrollment of over 132,000 regular students and 261,000 non-formal students. The Vice-President of India serves as the University's chancellor.
Document 11: University of Dayton: The University of Dayton (UD) is an American private Roman Catholic national research university in Ohio's sixth-largest city, Dayton. Founded in 1850 by the Society of Mary (Marianists), it is one of three Marianist universities in the nation and the second-largest private university in Ohio. The university's campus is located in the city's southern portion and spans 388 acres on both sides of the Great Miami River. The campus is noted for the Immaculate Conception Chapel and the University of Dayton Arena. The University also operates, in China's Suzhou Industrial Park, the University of Dayton China Institute.
Document 12: University of New Hampshire: The University of New Hampshire (UNH) is a public research university in the University System of New Hampshire, in the United States. The university's Durham campus, comprising six colleges, is located in the Seacoast region of the state. A seventh college, the University of New Hampshire at Manchester, occupies the university's campus in Manchester, the state's largest city. The University of New Hampshire School of Law, known as the Franklin Pierce Law Center until 2010, is located in Concord, the state's capital.
Document 13: University of Maryland, College Park: The University of Maryland, College Park (often referred to as the University of Maryland, Maryland, UM, UMD, UMCP, or College Park) is a public research university located in the city of College Park in Prince George's County, Maryland, approximately 4 mi from the northeast border of Washington, D.C. Founded in 1856, the university is the flagship institution of the University System of Maryland. With a fall 2010 enrollment of more than 37,000 students, over 100 undergraduate majors, and 120 graduate programs, Maryland is the largest university in the state and the largest in the Washington Metropolitan Area. It is a member of the Association of American Universities and competes in athletics as a member of the Big Ten Conference.
Document 14: List of Columbia University alumni: This is a sorted list of notable persons who are alumni of Columbia University, New York City. For further listing of notable Columbians see: Notable alumni at Columbia College of Columbia University; Columbia University School of General Studies; Barnard College; Columbia Law School; Columbia Business School; Columbia University Graduate School of Journalism; Columbia Graduate School of Architecture, Planning and Preservation; Columbia University College of Physicians and Surgeons; Columbia University Graduate School of Education (Teachers College); Fu Foundation School of Engineering and Applied Science; Columbia Graduate School of Arts and Sciences; Columbia University School of Professional Studies; Columbia University School of the Arts; and the School of International and Public Affairs.
Document 15: Princeton University: Princeton University is a private Ivy League research university in Princeton, New Jersey, United States. Founded in 1746 in Elizabeth as the College of New Jersey, Princeton is the fourth-oldest institution of higher education in the United States and one of the nine colonial colleges chartered before the American Revolution. The institution moved to Newark in 1747, then to the current site nine years later, where it was renamed Princeton University in 1896.
ground_truth: Columbia University