user: Question: Who is the entrant with a Cooper T43 chassis before 1958?
Columns: ['Year', 'Entrant', 'Chassis', 'Engine', 'Pts.']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1952.0, 'G. Caprara', 'Ferrari 500', 'Ferrari I4', 0.0]
SQL:

assistant: SELECT "Entrant" FROM "Table" WHERE "Year" < 1958.0 AND "Chassis" = 'Cooper T43';