user: Question: What was the most recent race at Kyalami with Keke Rosberg competing?
Columns: ['Year', 'Event', 'Venue', 'Driver', 'Result']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1975.0, 'BRDC International Trophy', 'Silverstone', 'Wilson Fittipaldi', 'Ret']
SQL:

assistant: SELECT MAX("Year") FROM "Table" WHERE "Venue" = 'Kyalami' AND "Driver" = 'Keke Rosberg';