Table: movie_track_info
Columns: film
song
year
music_director
language

Question: Tell me the song with year before 2013 and music director of yuvan shankar raja and film of billa ii
SQL: SELECT "song" FROM movie_track_info WHERE "year" < 2013 AND "music_director" = 'yuvan shankar raja' AND "film" = 'billa ii'