user: Question: What Round has a Time of N/A, in Rio de Janeiro , Brazil?
Columns: ['Res.', 'Record', 'Opponent', 'Method', 'Event', 'Round', 'Time', 'Location']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Loss', '2-7', 'Santos Samurai', 'DQ (punches after the bell)', 'Desafio de Gigantes 10', '2', '5:00', 'Macapá , Brazil']
SQL:

assistant: SELECT "Round" FROM "Table" WHERE "Time" = 'N/A' AND "Location" = 'Rio de Janeiro , Brazil';