user: Question: Which First elected has a District of Illinois 3?
Columns: ['District', 'Incumbent', 'Party', 'First elected', 'Result']
Types: ['text', 'text', 'text', 'real', 'text']
Sample row: ['Illinois 1', 'Elihu B. Washburne', 'Republican', 1852.0, 'Re-elected']
SQL:

assistant: SELECT "First elected" FROM "Table" WHERE "District" = 'Illinois 3';