user: Question: Which District has a First elected larger than 1858?
Columns: ['District', 'Incumbent', 'Party', 'First elected', 'Result']
Types: ['text', 'text', 'text', 'real', 'text']
Sample row: ['Massachusetts 1', 'Thomas D. Eliot', 'Republican', 1858.0, 'Re-elected']
SQL:

assistant: SELECT "District" FROM "Table" WHERE "First elected" > 1858.0;