user: Question: What is the method for a match with a Round larger than 2, he took a Loss, and 15–3 was the record?
Columns: ['Res.', 'Record', 'Opponent', 'Method', 'Event', 'Round', 'Location']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['Win', '30-10', 'Elmer Waterhen', 'TKO (punches)', "KOTC - Ali'is", 1.0, 'Honolulu, Hawaii , United States']
SQL:

assistant: SELECT "Method" FROM "Table" WHERE "Round" > 2.0 AND "Res." = 'Loss' AND "Record" = '15–3';