user: Question: What method was used in the match that went to round 1, and had a 6-3-1 record?
Columns: ['Res.', 'Record', 'Opponent', 'Method', 'Event', 'Round', 'Time', 'Location']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text', 'text']
Sample row: ['Loss', '23-17-4', 'Yasuaki Kishimoto', 'Decision (unanimous)', 'Deep - Osaka Impact', 3.0, '5:00', 'Osaka , Japan']
SQL:

assistant: SELECT "Method" FROM "Table" WHERE "Round" = 1.0 AND "Record" = '6-3-1';