user: Question: How many rounds did Germán Sánchez drive in where the chassis was Dallara F308?
Columns: ['Team', 'Driver', 'Class', 'Chassis', 'Rounds']
Types: ['text', 'text', 'text', 'text', 'text']
Sample row: ['Escuderia TEC-Auto', 'Bruno Méndez', 'A', 'Dallara F308', 'All']
SQL:

assistant: SELECT SUM("Rounds") FROM "Table" WHERE "Chassis" = 'Dallara F308' AND "Driver" = 'Germán Sánchez';