###Answer the question from the input provided. Please answer from input only.

###Input: The four-year, full-time undergraduate program comprises a minority of enrollments at the university and emphasizes instruction with an "arts and sciences focus". Between 1978 and 2008, entering students were required to complete a core curriculum of seven classes outside of their concentration. Since 2008, undergraduate students have been required to complete courses in eight General Education categories: Aesthetic and Interpretive Understanding, Culture and Belief, Empirical and Mathematical Reasoning, Ethical Reasoning, Science of Living Systems, Science of the Physical Universe, Societies of the World, and United States in the World. Harvard offers a comprehensive doctoral graduate program and there is a high level of coexistence between graduate and undergraduate degrees. The Carnegie Foundation for the Advancement of Teaching, The New York Times, and some students have criticized Harvard for its reliance on teaching fellows for some aspects of undergraduate education; they consider this to adversely affect the quality of education.

Harvard's academic programs operate on a semester calendar beginning in early September and ending in mid-May. Undergraduates typically take four half-courses per term and must maintain a four-course rate average to be considered full-time. In many concentrations, students can elect to pursue a basic program or an honors-eligible program requiring a senior thesis and/or advanced course work. Students graduating in the top 4–5% of the class are awarded degrees summa cum laude, students in the next 15% of the class are awarded magna cum laude, and the next 30% of the class are awarded cum laude. Harvard has chapters of academic honor societies such as Phi Beta Kappa and various committees and departments also award several hundred named prizes annually. Harvard, along with other universities, has been accused of grade inflation, although there is evidence that the quality of the student body and its motivation have also increased. Harvard College reduced the number of students who receive Latin honors from 90% in 2004 to 60% in 2005. Moreover, the honors of "John Harvard Scholar" and "Harvard College Scholar" will now be given only to the top 5 percent and the next 5 percent of each class.

For the 2012–13 school year annual tuition was $38,000, with a total cost of attendance of $57,000. Beginning 2007, families with incomes below $60,000 pay nothing for their children to attend, including room and board. Families with incomes between $60,000 to $80,000 pay only a few thousand dollars per year, and families earning between $120,000 and $180,000 pay no more than 10% of their annual incomes. In 2009, Harvard offered grants totaling $414 million across all eleven divisions;[further explanation needed] $340 million came from institutional funds, $35 million from federal support, and $39 million from other outside support. Grants total 88% of Harvard's aid for undergraduate students, with aid also provided by loans (8%) and work-study (4%).

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.

Harvard operates several arts, cultural, and scientific museums. The Harvard Art Museums comprises three museums. The Arthur M. Sackler Museum includes collections of ancient, Asian, Islamic and later Indian art, the Busch-Reisinger Museum, formerly the Germanic Museum, covers central and northern European art, and the Fogg Museum of Art, covers Western art from the Middle Ages to the present emphasizing Italian early Renaissance, British pre-Raphaelite, and 19th-century French art. The Harvard Museum of Natural History includes the Harvard Mineralogical Museum, Harvard University Herbaria featuring the Blaschka Glass Flowers exhibit, and the Museum of Comparative Zoology. Other museums include the Carpenter Center for the Visual Arts, designed by Le Corbusier, housing the film archive, the Peabody Museum of Archaeology and Ethnology, specializing in the cultural history and civilizations of the Western Hemisphere, and the Semitic Museum featuring artifacts from excavations in the Middle East.



###Question: Between 1978 an d2008 four year full time undergraduate students were required to complete how many classes outside of their concentration?

###Answer: {'answer':'core curriculum of seven classes'}