user: Question: What is the highest Round, when the Opponent is Junior Pitbull?
Columns: ['Result', 'Record', 'Opponent', 'Method', 'Date', 'Round', 'Location', 'Notes']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text', 'text']
Sample row: ['Win', '1-0-0', 'Joa Mendes', 'Knockout (Strikes)', '1995', 1.0, 'Itapeua , Brazil', 'Vale Tudo']
SQL:

assistant: SELECT MAX("Round") FROM "Table" WHERE "Opponent" = 'Junior Pitbull';