Who directed the episode titled 'Ghosts'?
CREATE TABLE table_26441 (
    "No. by series" real,
    "Title" text,
    "Directed by" text,
    "Written by" text,
    "Original air date" text,
    "Production number" real,
    "U.S. viewers (in millions)" text
)
SELECT "Directed by" FROM table_26441 WHERE "Title" = 'Ghosts'
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 the episode titled 'Ghosts'? ### Input: CREATE TABLE table_26441 (
    "No. by series" real,
    "Title" text,
    "Directed by" text,
    "Written by" text,
    "Original air date" text,
    "Production number" real,
    "U.S. viewers (in millions)" text
) ### Response: SELECT "Directed by" FROM table_26441 WHERE "Title" = 'Ghosts'