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_17623902_1 (original_air_date VARCHAR, written_by VARCHAR)

### Question ###
What was the original air date of this episode that was written by Debbie Sarjeant?

### Accurate SQL ###

SELECT original_air_date FROM table_17623902_1 WHERE written_by = "Debbie Sarjeant"