user: Question: Who was the opponent during the Biggest defeat?
Columns: ['Record', 'Date and Time', 'Competition', 'Home or Away', 'Opponent', 'Score']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Biggest win', '19.10.1912 at 15:00', 'Spartan League', 'Home', 'Aylesbury United', '14–0']
SQL:

assistant: SELECT "Opponent" FROM "Table" WHERE "Record" = 'Biggest defeat';