Question: Which University is a private Ivy League university, University of Delaware or Columbia University?
Context: The 2013–14 Columbia Lions men's basketball team represented Columbia University during the 2013–14 NCAA Division I men's basketball season.  The Lions, led by fourth year head coach Kyle Smith, played their home games at Levien Gymnasium and were members of the Ivy League.  They finished the season 21–13, 8–6 in Ivy League play to finish in a tie for third place.  They were invited to the CollegeInsdier.com Tournament where they defeated Valparaiso and Eastern Michigan to advance to the quarterfinals where they lost to fellow Ivy League member Yale. 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. The 2016–17 Columbia Lions men's basketball team represented Columbia University during the 2016–17 NCAA Division I men's basketball season.  The Lions, led by first-year head coach Jim Engles, played their home games at Levien Gymnasium in New York City and were members of the Ivy League.  They finished the season 11–16, 5–9 in Ivy League play to finish in fifth place.  They failed to qualify for the inaugural Ivy League Tournament. 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. 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. This list of Ivy League medical schools outlines the seven universities of the Ivy League that host a medical school.  Only one Ivy League university, Princeton University, does not have a medical school.  All Ivy League medical schools are located in the Northeast region of the United States and are privately owned and controlled.  Only two of the schools, at Dartmouth and Penn, are located adjacent to the undergraduate campuses.  The schools at Brown, Columbia, Harvard, and Yale, are located on separate campuses in the same metropolitan area as the university.  The school at Cornell, Weill Cornell Medicine, is located in New York City, far from the main Ithaca campus. The Wharton School of the University of Pennsylvania ( ; also known as the Wharton School or simply Wharton) is the business school of the University of Pennsylvania, a private Ivy League university located in Philadelphia, Pennsylvania.  Wharton was established in 1881 through a donation from Joseph Wharton and is the world’s first collegiate school of business. Weill Cornell Medicine is the biomedical research unit and medical school of Cornell University, a private Ivy League university.  The medical college is located at 1300 York Avenue, on the Upper East Side of Manhattan in New York City, along with the Weill Cornell Graduate School of Medical Sciences. The School of Hotel Administration (SHA, more commonly known as the Hotel School) at Cornell University is a specialized business school in the SC Johnson College of Business at Cornell University, a private Ivy League university located in Ithaca, New York.  Founded in 1922, it was the world's first four-year intercollegiate school devoted to hospitality management. 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.
Answer: Columbia University