user: Question: What is the highest round reached by an oppo ent of JR Schumacher?
Columns: ['Res.', 'Record', 'Opponent', 'Method', 'Event', 'Round', 'Time', 'Location']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text', 'text']
Sample row: ['Win', '15-5', 'Justin Guthrie', 'Submission (triangle choke)', 'Crowbar MMA - Winter Brawl', 2.0, '1:57', 'Fargo, North Dakota , United States']
SQL:

assistant: SELECT MAX("Round") FROM "Table" WHERE "Opponent" = 'JR Schumacher';