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_28047 ( "Series no." real, "No. in season" real, "Title" text, "Written by" text, "Directed by" text, "Original air date" text )

### Question ###
How many people directed the episode that Joe Toplyn wrote?

### Accurate SQL ###

SELECT COUNT("Directed by") FROM table_28047 WHERE "Written by" = 'Joe Toplyn'