Table schema:
CREATE TABLE table_name_26 (cbs_airdate VARCHAR, episode VARCHAR, airdate__usa_ VARCHAR)

Question: What is the CBS airdate of the episode with a number under 70 with a USA airdate of 1 April 2005?
SQL: SELECT cbs_airdate FROM table_name_26 WHERE episode < 70 AND airdate__usa_ = "1 april 2005"