What kind of Disc number has a Track number of 02 on 7 september 2004?
CREATE TABLE "discography" (
  "release_date" text,
  "album_title" text,
  "record_label" text,
  "disc_number" text,
  "track_number" text,
  "title" text
);
SELECT "disc_number" FROM "discography" WHERE "track_number"='02' AND "release_date"='7 september 2004';