user: Question: Which rounds did Vic Elford with a Ford Cosworth DFV 3.0 V8 engine have?
Columns: ['Constructor', 'Chassis', 'Engine', 'Tyre', 'Driver', 'Rounds']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Lotus - Ford', '49B 63', 'Ford Cosworth DFV 3.0 V8', 'F', 'Graham Hill', '1-10']
SQL:

assistant: SELECT "Rounds" FROM "Table" WHERE "Driver" = 'Vic Elford' AND "Engine" = 'Ford Cosworth DFV 3.0 V8';