user: Question: Which institution is Private/Catholic?
Columns: ['Institution', 'Location', 'Founded', 'Affiliation', 'Enrollment', 'Nickname']
Types: ['text', 'text', 'real', 'text', 'real', 'text']
Sample row: ['University of Illinois', 'Urbana, IL', 1867.0, 'Public', 42606.0, 'Fighting Illini']
SQL:

assistant: SELECT "Institution" FROM "Table" WHERE "Affiliation" = 'Private/Catholic';