Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_23346 ( "Rank" real, "City" text, "1890 census" text, "1910 census" real, "1920 census" real, "1930 census" real, "1940 census" real )

### Question ###
For cities with a census of 296000 in 1940, what was their census in 1920?

### Accurate SQL ###

SELECT "1920 census" FROM table_23346 WHERE "1940 census" = '296000'