user: Question: What is the highest round number with a time of 4:39?
Columns: ['Res.', 'Record', 'Opponent', 'Method', 'Round', 'Time', 'Location']
Types: ['text', 'text', 'text', 'text', 'real', 'text', 'text']
Sample row: ['Win', '15–4', 'Andrei Arlovski', 'Decision (unanimous)', 3.0, '5:00', 'Atlantic City, New Jersey United States']
SQL:

assistant: SELECT MAX("Round") FROM "Table" WHERE "Time" = '4:39';