user: Question: Which Venue has an Opposing Team of Manchester United, and a Round of 5th Round Replay?
Columns: ['Opposing Team', 'Against', 'Date', 'Venue', 'Round']
Types: ['text', 'real', 'text', 'text', 'text']
Sample row: ['Norwich City', 1.0, '7 January 1950', 'H', '3rd Round']
SQL:

assistant: SELECT "Venue" FROM "Table" WHERE "Opposing Team" = 'Manchester United' AND "Round" = '5th Round Replay';