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_24399615_8 ( airdate VARCHAR, bbc_three_weekly_ranking VARCHAR )

### Question ###
When 3 is the bbc three weekly ranking what is the airdate?

### Accurate SQL ###

SELECT airdate FROM table_24399615_8 WHERE bbc_three_weekly_ranking = "3"