user: Question: On what date is the venue Sam Nujoma Stadium, Windhoek, Namibia?
Columns: ['Date', 'Venue', 'Score', 'Result', 'Competition']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['23 July 2006', 'Independence Stadium , Windhoek , Namibia', '2–1', '3–2', '2006 COSAFA Cup']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Venue" = 'Sam Nujoma Stadium, Windhoek, Namibia';