user: Question: Name the lowest round for when pole position and winning driver is Michael Schumacher
Columns: ['Round', 'Grand Prix', 'Pole Position', 'Fastest Lap', 'Winning Driver', 'Winning Constructor', 'Report']
Types: ['real', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: [1.0, 'Brazilian Grand Prix', 'Ayrton Senna', 'Michael Schumacher', 'Michael Schumacher', 'Benetton - Ford', 'Report']
SQL:

assistant: SELECT MIN("Round") FROM "Table" WHERE "Fastest Lap" = 'Michael Schumacher' AND "Winning Driver" = 'Michael Schumacher' AND "Pole Position" = 'Michael Schumacher';