user: Question: Who constructed the car that won the Canadian Grand Prix?
Columns: ['Grand Prix', 'Pole Position', 'Fastest Lap', 'Winning Driver', 'Constructor', 'Report']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Australian Grand Prix', 'Rubens Barrichello', 'Kimi Räikkönen', 'Michael Schumacher', 'Ferrari', 'Report']
SQL:

assistant: SELECT "Constructor" FROM "Table" WHERE "Grand Prix" = 'Canadian Grand Prix';