user: Question: For cities with a census of 296000 in 1940, what was their census in 1920?
Columns: ['Rank', 'City', '1890 census', '1910 census', '1920 census', '1930 census', '1940 census']
Types: ['real', 'text', 'text', 'real', 'real', 'real', 'real']
Sample row: [1.0, 'Keijō', '1,165,000', 230000.0, 247000.0, 350000.0, 1100000.0]
SQL:

assistant: SELECT "1920 census" FROM "Table" WHERE "1940 census" = 296000.0;