user: ### NOW ANSWER:
Question: Who is the away team when there are 15 ties?
Columns: ['Tie no', 'Home team', 'Score', 'Away team', 'Date']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['1', 'Chesterfield', '2–2', 'Burnley', '10 December 1983']
SQL:

assistant: SELECT "Away team" FROM "Table" WHERE "Tie no" = '15';