Table schema:
CREATE TABLE table_name_17 (original_air_date INTEGER, dvd_region_2_release_date VARCHAR, number_of_episodes VARCHAR)

Question: What's the latest original air date with more than 10 episodes and a DVD Region 2 release date of 23 april 2012?
SQL: SELECT MAX(original_air_date) FROM table_name_17 WHERE dvd_region_2_release_date = "23 april 2012" AND number_of_episodes > 10