user: Question: Which DAte hAs An Opponent of MAnchester United, And A Venue A?
Columns: ['Date', 'Opponent', 'Venue', 'Result', 'Attendance']
Types: ['text', 'text', 'text', 'text', 'real']
Sample row: ['19 August 2000', 'Coventry City', 'A', '3–1', 20624.0]
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Opponent" = 'Manchester United' AND "Venue" = 'A';