user: Question: Who is the away team for tie no 15?
Columns: ['Tie no', 'Home team', 'Score 1', 'Away team', 'Attendance', 'Date']
Types: ['real', 'text', 'text', 'text', 'real', 'text']
Sample row: [1.0, 'Hull City', '4–1', 'Stockport County', 13753.0, '06-11-1973']
SQL:

assistant: SELECT "Away team" FROM "Table" WHERE "Tie no" = 15.0;