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_19294 ( "Series #" real, "Title" text, "Story by" text, "Teleplay by" text, "Directed by" text, "Original air date" text )

### Question ###
Who directed series #4 that was teleplayed by David Simon?

### Accurate SQL ###

SELECT COUNT("Directed by") FROM table_19294 WHERE "Teleplay by" = 'David Simon' AND "Series #" = '4'