when was the episode premiere if the production code is 11.19?
CREATE TABLE table_24871 (
    "No. in series" real,
    "No. in season" real,
    "Title" text,
    "Directed by" text,
    "Written by" text,
    "Original air date" text,
    "Production code" text
)
SELECT COUNT("Original air date") FROM table_24871 WHERE "Production code" = '11.19'
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: when was the episode premiere if the production code is 11.19? ### Input: CREATE TABLE table_24871 (
    "No. in series" real,
    "No. in season" real,
    "Title" text,
    "Directed by" text,
    "Written by" text,
    "Original air date" text,
    "Production code" text
) ### Response: SELECT COUNT("Original air date") FROM table_24871 WHERE "Production code" = '11.19'