user: Question: What tyre has 1 round with Dave Charlton driving?
Columns: ['Entrant', 'Constructor', 'Chassis', 'Tyre', 'Driver', 'Rounds']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Bruce McLaren Motor Racing', 'McLaren - BRM', 'M5A', 'G', 'Denny Hulme', '1']
SQL:

assistant: SELECT "Tyre" FROM "Table" WHERE "Rounds" = '1' AND "Driver" = 'Dave Charlton';