Who is the music-director for the song from the film khaleja who had a co-singer of hemachandra?
CREATE TABLE "best_songs_in_telugu" (
  "year" real,
  "song_title" text,
  "film" text,
  "co_singer" text,
  "music_director" text
);
SELECT "music_director" FROM "best_songs_in_telugu" WHERE "co_singer"='hemachandra' AND "film"='khaleja';