Who wrote episode number 18?
CREATE TABLE table_30383 (
    "\u2116" real,
    "#" real,
    "Title" text,
    "Directed by" text,
    "Written by" text,
    "Original air date" text,
    "Production code" text,
    "U.S. viewers (millions)" text
)
SELECT "Written by" FROM table_30383 WHERE "#" = '18'
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 wrote episode number 18? ### Input: CREATE TABLE table_30383 (
    "\u2116" real,
    "#" real,
    "Title" text,
    "Directed by" text,
    "Written by" text,
    "Original air date" text,
    "Production code" text,
    "U.S. viewers (millions)" text
) ### Response: SELECT "Written by" FROM table_30383 WHERE "#" = '18'