how many producers are responsible for the song 'calling out to marlboro?
CREATE TABLE "discography_original_releases" (
  "year" real,
  "song_s" text,
  "producer_s" text,
  "written_by" text,
  "artist" text,
  "title_label" text
);
SELECT COUNT("producer_s") FROM "discography_original_releases" WHERE "song_s"='Calling Out to Marlboro';