user: Question: During what Years of Operation was the location Prospect 33 Prospect Ave?
Columns: ['Name', 'Years of Operation', 'Location', 'Historical Photos', 'Year Clubhouse Constructed', 'Sign-in/Bicker', 'Year co-ed']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['The Ivy Club', '1879–current', 'Prospect 43 Prospect Ave', 'link', '1897', 'Bicker', '1991']
SQL:

assistant: SELECT "Years of Operation" FROM "Table" WHERE "Location" = 'Prospect 33 Prospect Ave';