Which Engine has a Team of Chesterfield Racing and include a Chassis of March 761?
CREATE TABLE "complete_formula_one_world_championship_" (
  "year" real,
  "team" text,
  "chassis" text,
  "engine" text,
  "points" real
);
SELECT "engine" FROM "complete_formula_one_world_championship_" WHERE "team"='chesterfield racing' AND "chassis"='march 761';