user: Question: In what tie were Leeds United the away team?
Columns: ['Tie no', 'Home team', 'Score 1', 'Away team', 'Attendance']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1.0, 'Sunderland', '1 – 2', 'Blackburn Rovers', 18555.0]
SQL:

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