What is the original airdate of the episode that had 8.23 million viewers?
CREATE TABLE table_26139378_1 (
    original_airdate VARCHAR,
    viewers__in_millions_ VARCHAR
)
SELECT original_airdate FROM table_26139378_1 WHERE viewers__in_millions_ = "8.23"
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: What is the original airdate of the episode that had 8.23 million viewers? ### Input: CREATE TABLE table_26139378_1 (
    original_airdate VARCHAR,
    viewers__in_millions_ VARCHAR
) ### Response: SELECT original_airdate FROM table_26139378_1 WHERE viewers__in_millions_ = "8.23"