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_1952057_5 (afc_championships VARCHAR, playoff_berths VARCHAR)

### Question ###
If the playoff berth is 17, what is the AFC championship number?

### Accurate SQL ###

SELECT afc_championships FROM table_1952057_5 WHERE playoff_berths = 17