user: Question: What are the rounds for the B tyres and Ferrari 053 engine +?
Columns: ['Entrant', 'Constructor', 'Chassis', 'Engine †', 'Tyre', 'Driver', 'Rounds', 'Free Practice driver(s)']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Scuderia Ferrari Marlboro', 'Ferrari', 'F2004', 'Ferrari 053', 'B', 'Michael Schumacher', 'All', 'N/A']
SQL:

assistant: SELECT "Rounds" FROM "Table" WHERE "Tyre" = 'B' AND "Engine †" = 'Ferrari 053';