how many of the episodes did not air in the u.s. ?
CREATE TABLE table_203_306 (
    id number,
    "no." number,
    "title" text,
    "directed by" text,
    "written by" text,
    "original air date" text
)
SELECT COUNT("title") FROM table_203_306 WHERE "original air date" IS NULL
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: how many of the episodes did not air in the u.s. ? ### Input: CREATE TABLE table_203_306 (
    id number,
    "no." number,
    "title" text,
    "directed by" text,
    "written by" text,
    "original air date" text
) ### Response: SELECT COUNT("title") FROM table_203_306 WHERE "original air date" IS NULL