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_27615445_1 ( episode_air_date VARCHAR, audition_city VARCHAR )

### Question ###
How many episode air dates are there for auditioning city Rio De Janeiro?

### Accurate SQL ###

SELECT COUNT(episode_air_date) FROM table_27615445_1 WHERE audition_city = "Rio de Janeiro"