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_30030227_1 (written_by VARCHAR, directed_by VARCHAR)

### Question ###
How many people wrote the episode directed by Arvin Brown?

### Accurate SQL ###

SELECT COUNT(written_by) FROM table_30030227_1 WHERE directed_by = "Arvin Brown"