user: Question: What is the nickname of Columbia University?
Columns: ['Institution', 'Location', 'Nickname', 'Enrollment', 'Established']
Types: ['text', 'text', 'text', 'text', 'real']
Sample row: ['American University', 'Washington, DC', 'Eagles', '5,866', 2000.0]
SQL:

assistant: SELECT "Nickname" FROM "Table" WHERE "Institution" = 'Columbia University';