user: Question: How did the match end when his record was 15-11?
Columns: ['Res.', 'Record', 'Opponent', 'Method', 'Event', 'Round', 'Location']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Win', '17-16', 'Steve Granieri', 'KO (knee)', 'Fight To Win: Outlaws', '2', 'Denver, Colorado']
SQL:

assistant: SELECT "Method" FROM "Table" WHERE "Record" = '15-11';