user: Question: Which entrant had a chassis of March CG891?
Columns: ['Year', 'Entrant', 'Chassis', 'Engine', 'Pts.']
Types: ['real', 'text', 'text', 'text', 'real']
Sample row: [1988.0, 'Leyton House March Racing Team', 'March 881', 'Judd V8', 5.0]
SQL:

assistant: SELECT "Entrant" FROM "Table" WHERE "Chassis" = 'March CG891';