<human>:  What are the top 20 universities in the USA?
<bot>: 
1. Harvard University
2. Stanford University
3. Yale University
4. Princeton University
5. Massachusetts Institute of Technology
6. Columbia University
7. University of Chicago
8. California Institute of Technology
9. University of Pennsylvania
10. Duke University
11. Johns Hopkins University
12. Northwestern University
13. Cornell University
14. Vanderbilt University
15. Washington University in St. Louis
16. Rice University
17. University of Notre Dame
18. University of California Berkeley
19. University of Southern California
20. University of California Los Angeles