user: Question: What's the lowest round with the opponent John Howard that had a method of Decision (unanimous)?
Columns: ['Res.', 'Record', 'Opponent', 'Method', 'Event', 'Round', 'Time', 'Location']
Types: ['text', 'text', 'text', 'text', 'text', 'real', 'text', 'text']
Sample row: ['Loss', '14-7 (1)', 'Jordan Mein', 'TKO (punches)', 'UFC 158', 1.0, '4:42', 'Montreal, Quebec , Canada']
SQL:

assistant: SELECT MIN("Round") FROM "Table" WHERE "Method" = 'Decision (unanimous)' AND "Opponent" = 'John Howard';