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_20726262_4 (writtenby VARCHAR, production_code VARCHAR)

### Question ###
what is the written by and production code is 3wab03?

### Accurate SQL ###

SELECT writtenby FROM table_20726262_4 WHERE production_code = "3WAB03"