When did the length of 60 minutes air?
CREATE TABLE table_15117 (
    "Title" text,
    "Length" text,
    "Writer" text,
    "Director" text,
    "Airdate" text
)
SELECT "Airdate" FROM table_15117 WHERE "Length" = '60 minutes'
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 did the length of 60 minutes air? ### Input: CREATE TABLE table_15117 (
    "Title" text,
    "Length" text,
    "Writer" text,
    "Director" text,
    "Airdate" text
) ### Response: SELECT "Airdate" FROM table_15117 WHERE "Length" = '60 minutes'