what is the total number of films directy and written by john callaghan?
CREATE TABLE table_74141 (
    "#" real,
    "No." real,
    "Title" text,
    "Directed by" text,
    "Written by" text,
    "Viewers" real,
    "Original airdate" text,
    "Prod. code" real
)
SELECT COUNT("Directed by") FROM table_74141 WHERE "Written by" = 'John Callaghan'
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: what is the total number of films directy and written by john callaghan? ### Input: CREATE TABLE table_74141 (
    "#" real,
    "No." real,
    "Title" text,
    "Directed by" text,
    "Written by" text,
    "Viewers" real,
    "Original airdate" text,
    "Prod. code" real
) ### Response: SELECT COUNT("Directed by") FROM table_74141 WHERE "Written by" = 'John Callaghan'