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_34 (airdate VARCHAR, episode_no VARCHAR, bbc_one_weekly_ranking VARCHAR)

### Question ###
What were the air-dates of the episodes before episode 4 that had a BBC One weekly ranking of 6?

### Accurate SQL ###

SELECT airdate FROM table_name_34 WHERE episode_no < 4 AND bbc_one_weekly_ranking = 6