user: Question: On what Date in Stade Leopold Senghor, Dakar was the Score 4–0?
Columns: ['Date', 'Venue', 'Score', 'Result', 'Competition']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['6 June 1999', 'Stade du 4-Août , Ouagadougou', '1–0', '2–2', '1999 African Cup of Nations qualifier']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Score" = '4–0' AND "Venue" = 'Stade Leopold Senghor, Dakar';