Who directed series #4 that was teleplayed by David Simon?
CREATE TABLE table_19294 (
    "Series #" real,
    "Title" text,
    "Story by" text,
    "Teleplay by" text,
    "Directed by" text,
    "Original air date" text
)
SELECT COUNT("Directed by") FROM table_19294 WHERE "Teleplay by" = 'David Simon' AND "Series #" = '4'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: Who directed series #4 that was teleplayed by David Simon? ### Input: CREATE TABLE table_19294 (
    "Series #" real,
    "Title" text,
    "Story by" text,
    "Teleplay by" text,
    "Directed by" text,
    "Original air date" text
) ### Response: SELECT COUNT("Directed by") FROM table_19294 WHERE "Teleplay by" = 'David Simon' AND "Series #" = '4'