user: Question: In which district is the incumbent Carl W. Rich?
Columns: ['District', 'Incumbent', 'Party', 'First elected', 'Result', 'Candidates']
Types: ['text', 'text', 'text', 'real', 'text', 'text']
Sample row: ['Ohio 1', 'Carl W. Rich', 'Republican', 1962.0, 'Lost re-election Democratic gain', 'John J. Gilligan (D) 51.9% Carl W. Rich (R) 48.1%']
SQL:

assistant: SELECT "District" FROM "Table" WHERE "Incumbent" = 'Carl W. Rich';