user: Question: Which Driver has a Date of 16th September 1951, and a Race of DNS?
Columns: ['Date', 'Event', 'Circuit', 'Driver', 'Race']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['26th June 1950', 'BRDC International Trophy Qualifying heat', 'Silverstone', 'Raymond Sommer', 'Ret']
SQL:

assistant: SELECT "Driver" FROM "Table" WHERE "Date" = '16th September 1951' AND "Race" = 'DNS';