CREATE TABLE table_name_23 (song VARCHAR(255), film VARCHAR(255), year VARCHAR(255), music_director VARCHAR(255))
Tell me the song with year before 2013 and music director of yuvan shankar raja and film of billa ii
    
SQL: SELECT song FROM table_name_23 WHERE year < 2013 AND music_director = "yuvan shankar raja" AND film = "billa ii"