How many production codes have an original airdate of November 16, 1990?
CREATE TABLE table_26539 (
    "No. in series" real,
    "No. in season" real,
    "Title" text,
    "Directed by" text,
    "Written by" text,
    "Original air date" text,
    "Production code" real
)
SELECT COUNT("Production code") FROM table_26539 WHERE "Original air date" = 'November 16, 1990'
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 production codes have an original airdate of November 16, 1990? ### Input: CREATE TABLE table_26539 (
    "No. in series" real,
    "No. in season" real,
    "Title" text,
    "Directed by" text,
    "Written by" text,
    "Original air date" text,
    "Production code" real
) ### Response: SELECT COUNT("Production code") FROM table_26539 WHERE "Original air date" = 'November 16, 1990'