user: Question: What is the highest round a fight lasted against Masutatsu Yano?
Columns: ['Res.', 'Record', 'Opponent', 'Method', 'Event', 'Round', 'Location']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text']
Sample row: ['Loss', '9-17-1', 'Choi Mu-Bae', 'Decision (unanimous)', 'Pancrase - Changing Tour 3', 2.0, 'Tokyo , Japan']
SQL:

assistant: SELECT MAX("Round") FROM "Table" WHERE "Opponent" = 'Masutatsu Yano';