user: Question: What was the method for opponent of Ivan Serati?
Columns: ['Res.', 'Record', 'Opponent', 'Method', 'Event', 'Round', 'Time', 'Location']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text', 'text']
Sample row: ['Loss', '13–16–3 (1)', 'Ivan Serati', 'Submission (Rear Naked Choke)', 'Cage Rage 24: Feel the Pain', 2.0, '1:34', 'London, England']
SQL:

assistant: SELECT "Method" FROM "Table" WHERE "Opponent" = 'Ivan Serati';