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_name_9 (class VARCHAR, year VARCHAR, road_number VARCHAR)

### Question ###
Which class starts after 1939 and has a road number smaller than 3508?

### Accurate SQL ###

SELECT class FROM table_name_9 WHERE year > 1939 AND road_number < 3508