CREATE TABLE table_67803 ("Year" FLOAT, "Entrant" TEXT, "Chassis" TEXT, "Engine" TEXT, "Pts." FLOAT)

Which entrant had a chassis of March CG891?
SELECT "Entrant" FROM table_67803 WHERE "Chassis" = 'march cg891'
SELECT "Entrant" FROM "table_67803" WHERE "Chassis" = 'march cg891'