user: ### NOW ANSWER:
Question: When is the Mexican Grand Prix?
Columns: ['Race', 'Circuit', 'Date', 'Pole position', 'Fastest lap', 'Winning driver', 'Constructor', 'Tyre', 'Report']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['South African Grand Prix', 'Kyalami', '1 January', 'Jim Clark', 'Jim Clark', 'Jim Clark', 'Lotus - Ford', 'F', 'Report']
SQL:

assistant: SELECT "Date" FROM "Table" WHERE "Race" = 'Mexican Grand Prix';