user: Question: When the away team is Millwall, what is the total possible amount of tie numbers?
Columns: ['Tie no', 'Home team', 'Score 1', 'Away team', 'Attendance', 'Date']
Types: ['real', 'text', 'text', 'text', 'real', 'text']
Sample row: [2.0, 'Newcastle United', '0–1', 'Birmingham City', 19276.0, '07-11-1973']
SQL:

assistant: SELECT SUM("Tie no") FROM "Table" WHERE "Away team" = 'Millwall';