user: Question: Which Chassis was featured in the year 1971?
Columns: ['Year', 'Entrant', 'Chassis', 'Engine', 'Points']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1971.0, 'Clarke-Mordaunt-Guthrie Racing', 'March 711', 'Cosworth V8', 0.0]
SQL:

assistant: SELECT "Chassis" FROM "Table" WHERE "Year" = 1971.0;