user: Question: Which District has a First Elected of 1904 and an Incumbent of Duncan E. McKinlay?
Columns: ['District', 'Incumbent', 'Party', 'First elected', 'Result']
Types: ['text', 'text', 'text', 'real', 'text']
Sample row: ['California 1', 'James Gillett', 'Republican', 1902.0, 'Ran for governor Republican hold']
SQL:

assistant: SELECT "District" FROM "Table" WHERE "First elected" = 1904.0 AND "Incumbent" = 'Duncan E. McKinlay';