user: Question: What was the chassis when the entrant was Lavazza March, and the year was 1975?
Columns: ['Year', 'Entrant', 'Chassis', 'Engine', 'Points']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1974.0, 'Allied Polymer Group', 'Brabham BT42', 'Cosworth V8', 0.0]
SQL:

assistant: SELECT "Chassis" FROM "Table" WHERE "Entrant" = 'Lavazza March' AND "Year" = 1975.0;