user: Question: How many rounds did the event Rings: King of Kings 2000 Block A have with a record of 6-1?
Columns: ['Res.', 'Record', 'Opponent', 'Method', 'Event', 'Round', 'Time', 'Location']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text', 'text']
Sample row: ['Loss', '6-4-1', 'John Salter', 'KO (punches)', 'Adrenaline MMA 3', 1.0, '2:15', 'Birmingham, Alabama , United States']
SQL:

assistant: SELECT COUNT("Round") FROM "Table" WHERE "Event" = 'Rings: King of Kings 2000 Block A' AND "Record" = '6-1';