user: Question: Tell me the sum of round for record of 6-3
Columns: ['Res.', 'Record', 'Opponent', 'Method', 'Round', 'Time', 'Location']
Types: ['text', 'text', 'text', 'text', 'real', 'text', 'text']
Sample row: ['Loss', '10-7', 'Jeremy Kimball', 'Decision (unanimous)', 3.0, '5:00', 'Denver, Colorado , United States']
SQL:

assistant: SELECT SUM("Round") FROM "Table" WHERE "Record" = '6-3';