What was the airing date when the number of episodes was larger than 20 and had the genre of costume action?
CREATE TABLE table_78079 (
    "Airing date" text,
    "Number of episodes" real,
    "HD format" text,
    "Highest average point ratings" real,
    "Genre" text,
    "Official website" text
)
SELECT "Airing date" FROM table_78079 WHERE "Number of episodes" > '20' AND "Genre" = 'costume action'
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 was the airing date when the number of episodes was larger than 20 and had the genre of costume action? ### Input: CREATE TABLE table_78079 (
    "Airing date" text,
    "Number of episodes" real,
    "HD format" text,
    "Highest average point ratings" real,
    "Genre" text,
    "Official website" text
) ### Response: SELECT "Airing date" FROM table_78079 WHERE "Number of episodes" > '20' AND "Genre" = 'costume action'