user: Question: What is the average first elected for the district South Carolina 2?
Columns: ['District', 'Incumbent', 'Party', 'First elected', 'Results']
Types: ['text', 'text', 'text', 'real', 'text']
Sample row: ['South Carolina 1', 'Henry Brown, Jr.', 'Republican', 2000.0, 'Re-elected']
SQL:

assistant: SELECT AVG("First elected") FROM "Table" WHERE "District" = 'South Carolina 2';