user: Question: What district has Dan Crane as incumbent?
Columns: ['District', 'Incumbent', 'Party', 'First elected', 'Result', 'Candidates']
Types: ['text', 'text', 'text', 'real', 'text', 'text']
Sample row: ['Illinois 2', 'Gus Savage', 'Democratic', 1980.0, 'Re-elected', 'Gus Savage (D) 83.0% Dale F. Harman (R) 17.0%']
SQL:

assistant: SELECT "District" FROM "Table" WHERE "Incumbent" = 'Dan Crane';