user: Question: Who was the incumbent that Retired to run for the Senate Democratic hold?
Columns: ['District', 'Incumbent', 'Party', 'First elected', 'Result']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['South Carolina 1', 'William Elliott', 'Democratic', '1886 1896', 'Retired to run for the Senate Democratic hold']
SQL:

assistant: SELECT "Incumbent" FROM "Table" WHERE "Result" = 'Retired to run for the Senate Democratic hold';