user: Question: What is the round where there was a KO (punch)?
Columns: ['Res.', 'Record', 'Opponent', 'Method', 'Event', 'Round', 'Time', 'Location']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text', 'text']
Sample row: ['Loss', '10-2', 'Brian Bowles', 'Submission (guillotine choke)', 'WEC 37', 3.0, '1:11', 'Las Vegas, Nevada , United States']
SQL:

assistant: SELECT "Round" FROM "Table" WHERE "Method" = 'KO (punch)';