user: Question: What Round has the Method of Submission (single wing choke)?
Columns: ['Res.', 'Record', 'Opponent', 'Method', 'Event', 'Round', 'Time', 'Location']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text', 'text']
Sample row: ['Loss', '9-8-1', 'Kazuhiro Nakamura', 'Decision (unanimous)', "ASTRA: Yoshida's Farewell", 3.0, '5:00', 'Tokyo , Japan']
SQL:

assistant: SELECT "Round" FROM "Table" WHERE "Method" = 'Submission (single wing choke)';