CREATE TABLE table_name_29 (date VARCHAR(255), place VARCHAR(255), race_winners VARCHAR(255))
What date has a place of chernivtsi, and a race winners of etienne bax / kaspars stupelis? What
    
SQL: SELECT date FROM table_name_29 WHERE place = "chernivtsi" AND race_winners = "etienne bax / kaspars stupelis"