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_29747178_2 (written_by VARCHAR, directed_by VARCHAR)

### Question ###
Who is the writer when the director is bob berlinger?

### Accurate SQL ###

SELECT written_by FROM table_29747178_2 WHERE directed_by = "Bob Berlinger"