user: Question: What is Tie No., when Away Team is "Manchester United"?
Columns: ['Tie no', 'Home team', 'Score', 'Away team', 'Date']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['1', 'Southampton', '3–0', 'Wigan Athletic', '25 January 1986']
SQL:

assistant: SELECT "Tie no" FROM "Table" WHERE "Away team" = 'Manchester United';