What is the lowest amount of points for a Ford Cosworth DFR (Mader) 3.5 V8 engine?
CREATE TABLE "formula_one_results" (
  "year" real,
  "team" text,
  "chassis" text,
  "engine" text,
  "points" real
);
SELECT MIN("points") FROM "formula_one_results" WHERE "engine"='ford cosworth dfr (mader) 3.5 v8';