user: Question: Who was the incumbent who was first elected in 1876?
Columns: ['District', 'Incumbent', 'Party', 'First elected', 'Result']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['South Carolina 1', 'Samuel Dibble', 'Democratic', '1882', 'Re-elected']
SQL:

assistant: SELECT "Incumbent" FROM "Table" WHERE "First elected" = '1876';