CREATE TABLE table_15923 ("Season" CLOB, "Network" CLOB, "Season premiere" CLOB, "Season finale" CLOB, "TV season" CLOB, "Ranking" CLOB, "Viewers  ( in millions ) " CLOB)

The season premiere aired on September 11, 2000 aired on how many networks?
SELECT COUNT("Network") FROM table_15923 WHERE "Season premiere" = 'September 11, 2000'
SELECT COUNT("Network") FROM "table_15923" WHERE "Season premiere" = 'September 11, 2000'