user: Question: What is the episode number of the episode broadcast on 21 September 2001?
Columns: ['Episode Number', 'Broadcast Date', 'Title', 'Written by', 'Viewership (Millions)']
Types: ['text', 'text', 'text', 'text', 'real']
Sample row: ['9 – 2.1', '31 August 2001', '"All Roads Lead To Ramon"', 'James Hendrie & Ian Brown', 8.95]
SQL:

assistant: SELECT "Episode Number" FROM "Table" WHERE "Broadcast Date" = '21 September 2001';