user: Question: What is the winning driver of round 7?
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, 'Australian Grand Prix', 'Jacques Villeneuve', 'Jacques Villeneuve', 'Damon Hill', 'Williams - Renault', 'Report']
SQL:

assistant: SELECT "Winning Driver" FROM "Table" WHERE "Round" = 7.0;