user: Question: who is the driver with the engine ERA 1.5 L6 s and the chassis is ERA B?
Columns: ['Driver', 'Entrant', 'Constructor', 'Chassis', 'Engine', 'Tyre']
Types: ['text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Juan Manuel Fangio', 'SA Alfa Romeo', 'Alfa Romeo', 'Alfa Romeo 158', 'Alfa Romeo 159 LBC 1.5 L8 s', 'P']
SQL:

assistant: SELECT "Driver" FROM "Table" WHERE "Engine" = 'ERA 1.5 L6 s' AND "Chassis" = 'ERA B';