user: Question: What was the competition on October 21, 2003?
Columns: ['Date', 'Venue', 'Score', 'Result', 'Competition']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['September 29, 2003', 'Incheon', '1 goal', '16-0', '2004 AFC Asian Cup qualification']
SQL:

assistant: SELECT "Competition" FROM "Table" WHERE "Date" = 'October 21, 2003';