user: Question: who is the entrant when the points is 42 (45) and the chassis is Brabham BT20?
Columns: ['Year', 'Entrant', 'Chassis', 'Engine', 'Points']
Types: ['real', 'text', 'text', 'text', 'text']
Sample row: [1955.0, 'Cooper Car Company', 'Cooper T40', 'Bristol Straight-6', '0']
SQL:

assistant: SELECT "Entrant" FROM "Table" WHERE "Points" = '42 (45)' AND "Chassis" = 'Brabham BT20';