The season premiere aired on September 11, 2000 aired on how many networks? 
CREATE TABLE "u_s_television_ratings" (
  "season" text,
  "network" text,
  "season_premiere" text,
  "season_finale" text,
  "tv_season" text,
  "ranking" text,
  "viewers_in_millions" text
);
SELECT COUNT("network") FROM "u_s_television_ratings" WHERE "season_premiere"='September 11, 2000';