user: Question: What is the venue when the Round shows After extra time, Chelsea won on 4-1 on penalties?
Columns: ['Date', 'Round', 'Opponent', 'Venue', 'Result', 'Attendance', 'Scorers']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['15 October 1997', '3', 'Blackburn Rovers', 'H', '1-1', '18,671', 'Di Matteo']
SQL:

assistant: SELECT "Venue" FROM "Table" WHERE "Round" = 'After extra time, Chelsea won on 4-1 on penalties';