user: Question: What's the first elected year of the district who's been the last one to do so?
Columns: ['District', 'Incumbent', 'Party', 'First elected', 'Result', 'Candidates']
Types: ['text', 'text', 'text', 'real', 'text', 'text']
Sample row: ['Georgia 2', 'Sanford Bishop', 'Democratic', 1992.0, 'Re-elected', 'Sanford Bishop (D) 53.97% Darrel Ealum (R) 46.03%']
SQL:

assistant: SELECT MAX("First elected") FROM "Table";