user: Question: The season premiere aired on September 11, 2000 aired on how many networks? 
Columns: ['Season', 'Network', 'Season premiere', 'Season finale', 'TV season', 'Ranking', 'Viewers (in millions)']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['1st', 'UPN', 'September 11, 2000', 'May 14, 2001', '2000–2001', '#136', '4.0']
SQL:

assistant: SELECT COUNT("Network") FROM "Table" WHERE "Season premiere" = 'September 11, 2000';